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Predicting consumption: a lesson in real-time data 预测消费:实时数据的教训
Pub Date : 1900-01-01 DOI: 10.20955/ES.2008.28
Riccardo DiCecio, Charles S. Gascon
Continuing crises in U.S. housing and financial markets have increased concerns about an impending recession, which typically involves two quarters of negative GDP growth. All recessions since the early 1950s, except the one in 2001, included a contraction in personal consumption expenditures (PCE). Because roughly 70 percent of the country’s GDP can be attributed to PCE on goods and services, any contraction in consumption expenditures weighs heavily on economic growth. The Bureau of Economic Analysis (BEA) measures GDP and, two months after the end of each quarter, releases its GDP estimates for that quarter.1 In addition to releasing data on total output, the BEA releases data on each component of GDP: PCE, investment, government expenditures, and net exports. Unlike the other components, PCE estimates are also released monthly as part of the BEA’s “Personal Income and Outlays” report. Quarterly PCE is the average of monthly PCE over the three months in the quarter, and both monthly and quarterly data are subsequently revised multiple times. These monthly PCE releases have been spotlighted recently: As it turns out, the PCE measure for the second month of a given quarter is close to the measure for the entire quarter. For example, the PCE for February 2008 (reported March 28) was $8,365.5 billion; the advance release of 2008:Q1 PCE (reported May 1) was $8,369.1 billion. The rationale for using the second month as a proxy for a quarter’s average is simple: It is available sooner— one month before the advance release of the quarterly figure. It is also quite reliable: On average, the economy tends to grow; if the growth rate of consumption from month to month within a quarter is constant, the PCE for the second month is close to that quarter’s average. The chart plots the approximated (second-month) and actual growth rates of PCE since 1991 using real-time data: That is, the growth rates at each point on the chart are computed using only the data that would have been available to a researcher at the time of the estimate. The approximated measure for 2008:Q3 is –2.3 percent, suggesting the first decline in PCE since the fourth quarter of 1991. On average, the second-month PCE is close to the reported quarterly data; however, it under predicts the advance release by an average of 0.15 percentage points over the sample. The correlation between the two series in the chart is 0.90. Most of the difference between the two series disappears when data are revised. In fact, the actual quarterly PCE growth rate and the approximation using second-month data is almost perfect, differing by only 0.03 percentage points when both growth rates are computed using current data. In summary, this simple calculation can provide a quite accurate picture of the quarterly consumption growth rate a month ahead of the BEA’s first official release. In addition, the use of real-time (or unrevised) data is essential for evaluating the performance of this or any calculation.
美国房地产和金融市场的持续危机加剧了人们对即将到来的经济衰退的担忧,而经济衰退通常会导致GDP连续两个季度出现负增长。自20世纪50年代初以来的所有衰退,除了2001年的那次,都包括个人消费支出(PCE)的收缩。由于大约70%的国内生产总值可归因于商品和服务的个人消费支出,消费支出的任何收缩都会严重影响经济增长。美国经济分析局(BEA)衡量GDP,并在每个季度结束后两个月公布该季度的GDP预测除了公布总产出数据外,经济分析局还公布GDP各组成部分的数据:个人消费支出(PCE)、投资、政府支出和净出口。与其他组成部分不同的是,个人消费支出估计也是作为东亚局“个人收入和支出”报告的一部分每月发布的。季度个人消费支出是一个季度中三个月的月度个人消费支出的平均值,而月度和季度数据随后都会被多次修正。这些月度个人消费支出数据最近备受关注:事实证明,特定季度第二个月的个人消费支出数据与整个季度的数据接近。例如,2008年2月(3月28日报告)个人消费支出为83655亿美元;2008年第一季度个人消费支出(5月1日公布)为83691亿美元。使用第二个月作为季度平均值的依据很简单:它可以更早获得——比季度数据提前发布一个月。它也相当可靠:平均而言,经济倾向于增长;如果一个季度内每月的消费增长率不变,则第二个月的个人消费支出接近该季度的平均值。该图表使用实时数据绘制了自1991年以来PCE的近似值(第二个月)和实际增长率:也就是说,图表上每个点的增长率仅使用研究人员在估计时可用的数据计算。2008年第三季度的估计数据为- 2.3%,表明个人消费支出自1991年第四季度以来首次下降。平均而言,第二个月的个人消费支出接近季度报告数据;然而,它对提前发布的预测比样本平均低0.15个百分点。图表中两个序列的相关系数为0.90。当数据被修正时,这两个序列之间的大部分差异就消失了。事实上,实际的季度个人消费支出增长率和使用第二个月数据的近似值几乎是完美的,当两个增长率都使用当前数据计算时,差异仅为0.03个百分点。总而言之,这个简单的计算可以在经济分析局首次官方数据发布前一个月提供一个相当准确的季度消费增长率的图景。此外,使用实时(或未修改)数据对于评估此计算或任何计算的性能至关重要。
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引用次数: 0
Computer use and productivity growth 计算机的使用和生产力的增长
Pub Date : 1900-01-01 DOI: 10.20955/ES.2003.29
Rubén Hernández-Murillo
T he application of computing technologies by U.S. firms has exploded in recent years. Between 1990 and 2000, the average annual growth rate of real investment in computer capital was about 33 percent. Ever-declining prices of computer equipment, in quality-adjusted terms, allow firms to pursue more powerful and sophisticated applications of computers and improve the efficiency of basic business functions, such as supply-chain management. Although the rapid growth of computer investment contributes directly to business investment spending, economists have for a long time wondered how computer investment affects productivity. The impact could be substantial if the use of computers facilitates a broad collection of complementary innovations within firms. Until recently, however, the connection between computer use and business productivity growth has been unclear.1 Reexamining standard growth-accounting techniques, similar to those used in this publication, economists have identified in recent studies that computers do have potentially large effects on productivity growth—particularly in the long run, when computing technologies interact fully with a firm’s business practices. Because the benefits of computers are largely oriented toward intangible aspects of business activity, the impact of computer use may not be reflected in aggregate statistics. Indeed, investment in these technologies may have little direct impact on a firm’s productivity; only when these technologies are combined with organizational aspects over time do the contributions of computer investment become apparent. One example is Wal-Mart’s proprietary software that processes a large array of computer-collected data to determine specific goods to stock at specific stores at specific times of year, as well as their prices. Brynjolfsson and Hitt (2003) estimate the impact of computers on productivity by using firm-level data to reduce measurement problems of outputs and inputs that exist in industry-level data.2 They find that computer use accounts for a substantial share of total factor productivity (TFP) and output growth.3 They also find that computer investment has its maximal impact on productivity after about seven years. They estimate that, between 1987 and 1994, about 0.25 to 0.50 percentage points of TFP growth at the firm level was generated by the use of computer capital, which grew by about 25 percent per year. Although many studies focus on TFP growth, computers also contribute to labor productivity growth by increasing the stock of capital per worker. As seen in the chart, computer investment accelerated early in the 1990s, long before the “new economy” productivity acceleration took place. If the firm-level results are translated to the overall economy, the gains in TFP growth from the 1995-99 flurry of computer investment growth (which exceeded 40 percent per year) should peak around 2006. Hence, there is cause for optimism regarding productivity over the next few ye
近年来,美国公司对计算机技术的应用呈爆炸式增长。从1990年到2000年,计算机资本实际投资的平均年增长率约为33%。在质量调整条件下,不断下降的计算机设备价格允许公司追求更强大和更复杂的计算机应用,并提高基本业务功能的效率,如供应链管理。尽管计算机投资的快速增长直接促进了商业投资支出,但经济学家长期以来一直想知道计算机投资如何影响生产率。如果计算机的使用促进了企业内部广泛的互补创新,其影响可能是巨大的。然而,直到最近,计算机使用与企业生产率增长之间的联系一直不清楚经济学家在最近的研究中重新审视了与本出版物中使用的类似的标准增长会计技术,发现计算机确实对生产率增长有潜在的巨大影响——特别是从长远来看,当计算技术与公司的商业实践充分互动时。由于计算机的好处主要是面向商业活动的无形方面,计算机使用的影响可能不会在总体统计中反映出来。事实上,对这些技术的投资可能对企业的生产率几乎没有直接影响;只有当这些技术随着时间的推移与组织方面相结合时,计算机投资的贡献才会变得明显。一个例子是沃尔玛的专有软件,该软件处理大量计算机收集的数据,以确定特定商品在一年中的特定时间在特定商店库存,以及它们的价格。Brynjolfsson和Hitt(2003)通过使用企业层面的数据来减少行业层面数据中存在的产出和投入的测量问题,估计计算机对生产率的影响他们发现计算机的使用在全要素生产率(TFP)和产出增长中占有相当大的份额他们还发现,计算机投资对生产率的影响在大约7年后达到最大。他们估计,在1987年至1994年间,企业层面的全要素生产率增长中约有0.25至0.50个百分点是由计算机资本的使用产生的,每年增长约25%。尽管许多研究关注全要素生产率的增长,但计算机也通过增加每个工人的资本存量来促进劳动生产率的增长。如图所示,计算机投资在20世纪90年代早期加速,远早于“新经济”生产率加速发生。如果将公司层面的结果转化为整体经济,1995-99年计算机投资增长(每年超过40%)的TFP增长的收益应该在2006年左右达到顶峰。因此,有理由对未来几年的生产力持乐观态度,因为有证据表明,在企业进行投资后,使用计算机的好处会持续很长时间。
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引用次数: 4
Housing and the "R" word 住房和“R”字
Pub Date : 1900-01-01 DOI: 10.20955/ES.2008.5
D. Thornton
Views expressed do not necessarily reflect official positions of the Federal Reserve System. There has been considerable discussion of the possibility that ongoing troubles in the housing market could push the economy into recession.1 But it is very unlikely that the decline in housing alone will cause a recession. Any recessionary effect on the economy caused by housing will be a consequence of its effect on consumption. Real GDP is a measure of the economy’s current production. Sales of existing houses have no impact on current production because these houses were produced sometime in the past. The only direct effect housing has on current economic growth comes through the “residential investment” component of GDP, which includes current construction and improvements of singleand multi-family housing. Residential investment accounts for only about 5 percent of GDP; consequently, the effect of residential investment on economic growth is relatively modest. The chart shows this effect by plotting quarterly GDP growth with and without residential investment. (It also shows the quarterly growth rate of residential investment.) Excluding residential investment has only a small effect even during the 1970s and early 1980s, when the growth of residential investment was considerably more volatile than during the past two decades. Since residential investment peaked in the fourth quarter of 2005, its decline has reduced growth of real GDP by an average of about 0.85 percentage points. This decline has largely been offset by nonresidential investment, which has continued to grow at a brisk pace. Thus, as noted above, if the troubles in the housing industry were to cause a recession, it would have to be because of their effect on consumer spending. Consumers base their spending decisions not only on their current income, but also on their wealth. Other things the same, an increase in wealth should induce consumers to spend more of their current income. Hence, a decline in wealth could generate a decline in consumer spending. For many people the net worth of their home is the single most important source of wealth. Consequently, a decline in home prices can make people less wealthy, causing them to consume less. Because consumption accounts for about 70 percent of GDP, even relatively small changes in consumer spending can have a relatively large effect on output growth. Estimates suggest that the wealth effect associated with changes in equity values is weak or nonexistent. The wealth effect associated with housing wealth is stronger.2 Wealth effects are very difficult to identify and measure, however. Consequently, it is difficult to precisely determine the effect of the recent decline in home prices on consumption and, hence, output growth. It is interesting to note that growth of real consumption expenditures since the second quarter of 2006 has remained strong—in the range of 3 percent— despite the downturn in the S&P/Case-Shiller home price index sin
本文所表达的观点不一定反映联邦储备系统的官方立场。关于房地产市场持续的问题可能会把经济推入衰退的可能性,人们进行了相当多的讨论但单凭房价下跌就不太可能引发经济衰退。住房对经济造成的任何衰退影响都将是其对消费影响的后果。实际GDP是衡量经济当前生产的指标。现有房屋的销售对当前的生产没有影响,因为这些房屋是在过去的某个时候生产的。住房对当前经济增长的唯一直接影响来自GDP的“住宅投资”部分,其中包括当前单户和多户住房的建设和改善。住宅投资仅占GDP的5%左右;因此,住宅投资对经济增长的影响相对温和。该图表通过绘制有和没有住宅投资的季度GDP增长来显示这种影响。(它还显示了住宅投资的季度增长率。)即使在20世纪70年代和80年代初,排除住宅投资也只有很小的影响,当时住宅投资的增长比过去20年更加不稳定。自从住宅投资在2005年第四季度见顶以来,其下降已使实际GDP增长率平均下降了约0.85个百分点。这种下降在很大程度上被非住宅投资所抵消,非住宅投资继续以快速的速度增长。因此,如上所述,如果房地产行业的问题导致经济衰退,那一定是因为它们对消费者支出的影响。消费者的消费决定不仅取决于他们当前的收入,还取决于他们的财富。在其他条件相同的情况下,财富的增加应该会促使消费者花更多的现期收入。因此,财富的减少可能会导致消费支出的下降。对许多人来说,房屋净值是他们唯一最重要的财富来源。因此,房价下跌会使人们变得不那么富有,从而导致他们减少消费。由于消费约占GDP的70%,即使消费者支出的相对较小的变化也会对产出增长产生相对较大的影响。估计表明,与股权价值变化相关的财富效应很弱或根本不存在。与住房财富相关的财富效应更强然而,财富效应很难识别和衡量。因此,很难精确地确定最近房价下跌对消费以及产出增长的影响。值得注意的是,自2006年第二季度以来,实际消费支出的增长一直保持强劲——在3%的范围内——尽管标普/凯斯-席勒房价指数自那时以来有所下滑。
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引用次数: 1
Waiting for the investment boom? It might be a while 等待投资热潮?可能要等一段时间
Pub Date : 1900-01-01 DOI: 10.20955/es.2003.12
Kevin L. Kliesen
NationalEconomicTrends Views expressed do not necessarily reflect official positions of the Federal Reserve System. S ome economists believe that the 2001 recession ended in the fourth quarter of 2001 (see the inside cover of this publication). Since then, real business fixed investment (BFI)—expenditures on structures and equipment and software—has declined at a 2.2 percent annual rate. By contrast, in the first four quarters of the typical recovery, real BFI increases a little more than 8 percent. One reason why growth of real BFI has remained weak is that real GDP growth during the recovery has been weaker than normal, which is probably related to the mildness of the 2001 recession. Geopolitical uncertainties arising from the conflict with Iraq and tensions with North Korea may be another reason why business investment spending has been unusually weak. According to this argument , firms have been postponing plans for new capital projects until the risks become clearer. Indeed, in the policy statement issued after the March 18 Federal Open Market Committee meeting, Fed policymakers said that, until these uncertainties abate, they will not be able to " usefully characterize " the risks to the outlook. Another explanation is that a recovery in business investment is being hampered by a capital " overhang. " According to this view, the economy's actual capital stock currently exceeds its desired capital stock because of the investment boom of the late 1990s, which was perhaps exacerbated by the euphoria in the stock market. Some data support this argument: During the record-long 1991-2001 expansion, real BFI increased 113 percent and real GDP increased by about 39 percent. In contrast, during the 1961-69 expansion (the second-longest) real BFI increased 95 percent and real GDP increased by about 51 percent; and in the 1982-90 expansion (the third-longest), real BFI increased 42 percent and real GDP increased by about 37 percent. The strongest rates of business capital spending during the 1991-2001 expansion occurred toward its end. The accompanying chart shows this by plotting the Federal Reserve's measure of manufacturing capacity and real GDP since 1955. Economic theory says that growth of output (real GDP) will be commensurate with the growth of capital inputs and, by extension, capacity. From the first quarter of 1955 to the first quarter of 1994, growth of manufacturing capacity (3.4 percent per year) was nearly identical to the growth of real GDP (3.3 percent per year). Since 1994, …
本文所表达的观点不一定反映联邦储备系统的官方立场。一些经济学家认为2001年的经济衰退已经在2001年第四季度结束(见本刊内页)。从那时起,实际商业固定投资(BFI)——在结构、设备和软件上的支出——以每年2.2%的速度下降。相比之下,在典型复苏的前四个季度,实际BFI增长略高于8%。实际BFI增长保持疲软的一个原因是,复苏期间的实际GDP增长弱于正常水平,这可能与2001年经济衰退的温和程度有关。与伊拉克的冲突和与朝鲜的紧张局势带来的地缘政治不确定性可能是企业投资支出异常疲软的另一个原因。根据这种说法,企业一直在推迟新资本项目的计划,直到风险变得更加清晰。事实上,在3月18日联邦公开市场委员会(fomc)会议后发表的政策声明中,美联储政策制定者表示,在这些不确定性减弱之前,他们将无法“有效地描述”经济前景面临的风险。另一种解释是,商业投资的复苏受到资本“过剩”的阻碍。根据这一观点,由于20世纪90年代末的投资热潮,经济的实际资本存量目前超过了预期资本存量,而股市的乐观情绪可能加剧了这一热潮。一些数据支持这一观点:在创纪录的1991-2001年经济扩张期间,实际BFI增长了113%,实际GDP增长了约39%。相比之下,在1961-69年的经济扩张期间(第二长的),实际BFI增长了95%,实际GDP增长了约51%;在1982年至1990年的经济扩张期间(第三长的),实际BFI增长了42%,实际GDP增长了约37%。在1991-2001年经济扩张的末期,企业资本支出达到了最高水平。随附的图表通过绘制美联储自1955年以来对制造业能力和实际GDP的衡量来显示这一点。经济理论认为,产出(实际GDP)的增长将与资本投入的增长相称,进而与产能的增长相称。从1955年第一季度到1994年第一季度,制造业产能的增长(每年3.4%)几乎与实际GDP的增长(每年3.3%)相同。自1994年以来,……
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引用次数: 0
Boom & gloom in housing markets: the sequel 房地产市场的繁荣与萧条:续集
Pub Date : 1900-01-01 DOI: 10.20955/es.2008.12
Carlos Garriga
Views expressed do not necessarily reflect official positions of the Federal Reserve System. The effect that housing has on the economy has received increased attention in recent years—first for the recordhigh boom in house prices and homeownership and then for the decline in house prices and the subprime market meltdown. Part of the boom was fostered by important developments in housing finance such as the introduction of new mortgage products, a reduction in the cost of providing mortgage services, and the expansion of subprime lending and private securitization of mortgages. For example, instruments such as “piggyback” loans and option adjustable-rate mortgages accounted for 12.5 percent of the originations in 2004 and 32.1 percent in 2006. Mortgage market innovations and their importance in increasing house prices and homeownership have a historical precedent: After the collapse of mortgage markets during the Great Depression, policymakers’ goal was to increase owneroccupied housing. In the late 1930s, the creation of the Federal Housing Administration (FHA) led to changes in the terms of existing mortgage contracts. Prior to the Great Depression, the typical mortgage contract had a maturity of less than ten years, a 50 percent downpayment, no amortization, and a balloon payment at expiration. The FHA sponsored the use of a new mortgage with a longer duration, lower downpayment requirement, and self-amortizing structure. Government intervention provided uniform lending throughout the country that resulted in low and stable mortgage rates. Between 1942 and 1947, house prices and homeownership attained historical heights with an annual inflation-adjusted appreciation of 6.5 percent and a total increase in owner-occupied housing of 20 percent. Shortages of building materials and delays in construction of housing for lowincome families fueled the house price boom, followed by a bust once the supply of new construction caught up. The similarities between these time periods become clear by plotting inflation-adjusted U.S. house prices (see the chart), which suggests that periods following innovations in housing finance also include high appreciation. The magnitudes of the house price increases from both periods are qualitatively the same when the OFHEO index is used, and the most recent period is slightly higher (10 percent) according to the Case-Shiller index. However, the homeownership rate differs substantially across periods. Innovations in housing finance after the Great Depression reduced the barriers to homeownership for many middle-income households. These individuals had at least 20 percent of equity in the house to buffer a large decline in the price. That, combined with some legal restrictions to “walk away” from the house, kept the foreclosure rates at historically low levels. By contrast, the innovations in the past decade allowed firsttime (young and low-income households) and repeat buyers to purchase or refinance a house with a very
本文所表达的观点不一定反映联邦储备系统的官方立场。近年来,住房对经济的影响受到了越来越多的关注——首先是房价和住房拥有率的创纪录高位,然后是房价的下跌和次贷市场的崩溃。部分繁荣源于住房金融的重要发展,如新的抵押贷款产品的推出、提供抵押贷款服务成本的降低、次级贷款和私人抵押贷款证券化的扩大。例如,诸如“背负式”贷款和期权可调利率抵押贷款等工具在2004年和2006年分别占总贷款的12.5%和32.1%。抵押贷款市场的创新及其在提高房价和住房拥有率方面的重要性有历史先例:在大萧条期间抵押贷款市场崩溃后,政策制定者的目标是增加自有住房。20世纪30年代末,联邦住房管理局(FHA)的成立导致了现有抵押贷款合同条款的变化。在大萧条之前,典型的抵押贷款合同期限不到10年,首付50%,没有分期付款,到期时还会大量付款。联邦住房管理局支持使用一种新的抵押贷款,期限更长,首付要求更低,并具有自摊销结构。政府的干预在全国范围内提供了统一的贷款,从而导致了低而稳定的抵押贷款利率。1942年至1947年间,房价和住房拥有率达到历史最高水平,经通货膨胀调整后的年增长率为6.5%,自有住房总增长率为20%。建筑材料的短缺和低收入家庭住房建设的延迟推动了房价的上涨,随后,一旦新建筑的供应赶上,房价就会暴跌。通过绘制经通胀调整后的美国房价(见图表),这些时期之间的相似之处变得清晰起来,这表明住房金融创新后的时期也包括高升值。当使用OFHEO指数时,这两个时期的房价涨幅在质量上是相同的,根据Case-Shiller指数,最近一个时期的房价涨幅略高(10%)。然而,不同时期的住房拥有率差异很大。大萧条(Great Depression)之后,住房金融领域的创新降低了许多中等收入家庭拥有住房的障碍。这些人拥有至少20%的房屋权益,以缓冲价格的大幅下跌。这一点,再加上一些法律上对“离开”房屋的限制,使止赎率保持在历史低位。相比之下,过去十年的创新允许首次购房者(年轻和低收入家庭)和重复购房者以极低甚至没有首付的价格购买或再融资住房。这些低水平的资产净值增加了房主对房价普遍下跌的敞口,并引发了当前更高水平的止赎。住房和空缺调查(HVS/CPS)报告说,2004-07年期间,住房拥有率下降幅度最大的是45岁至54岁的个人;事实上,自20世纪90年代初以来,这一群体参与人数的增加大部分已经完全消失了。此外,年龄在44岁及以下的人的死亡率下降了50%左右。因此,这一经验表明,对于更容易丧失抵押品赎回权的高杠杆家庭来说,拥有住房不一定是最好的住房选择。卡洛斯有着
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引用次数: 0
TIPS for social security 社会保障小贴士
Pub Date : 1900-01-01 DOI: 10.20955/ES.2005.9
R. Anderson
Views expressed do not necessarily reflect official positions of the Federal Reserve System. The largest retirement plan in the United States is the Old Age, Survivors, and Disability Insurance (OASDI) program of the Social Security Administration. During 2004, 48 million persons received $493 billion in benefits, and 157 million persons with earnings subject to the program’s payroll tax furnished the bulk of the program’s $658 billion income. The $165 billion in excess revenue was added to the program’s trust fund, which at the end of 2004 totaled $1.7 trillion. During the next 25 years, it is projected that the OASDI program’s ratio of beneficiaries to taxpayers will decrease from its current 3.3 to 1 to about 2.2 to 1. As a result, it is projected that outlays will persistently exceed revenues after 2018 or so. Under current tax and benefit rules, and by drawing down the trust fund, it is projected that all scheduled benefit payments can be made for at least the next 25 years, at which time the trust fund will be exhausted. Thereafter, if no changes are made to benefits or taxes, it is projected that incoming tax revenue will be sufficient to fund about 70 percent of scheduled benefit payments through 2080. Many analysts (and politicians) have argued that this shortfall is unacceptable and that the OASDI program must change. Proposals include increasing the payroll tax, reducing benefit levels, increasing earnings on the trust fund’s investments, and delaying the age at which new retirees are eligible for full benefits. Economic analysis suggests it is important to analyze these proposals carefully because each is likely to have different effects on various groups in the economy. Consider, for example, the Social Security trust fund. Prior to 1983, the OASDI program operated largely as a pay-as-yougo system. Established by Congress in 1940, the program’s trust fund grew little prior to 1983 as a result of Congressional deferrals of proposed tax increases.1 In 11 of the years between 1940 and 1983, the level of the fund decreased as benefit outlays exceeded revenues. In 1983, the Greenspan commission on OASDI recommended that the program be changed from one in which benefits were paid solely from current revenues to a partially funded retirement plan. Payroll tax rates were increased, and the trust fund began to grow. Recently, some analysts have proposed that the trust fund ought to seek to earn a higher rate of return so as to mitigate the future OASDI shortfall. This proposal is problematic because the fund consists solely of Treasury securities. Not until benefit payments begin to exceed payroll tax revenues, say in 2018, will the Treasury be required to redeem these securities and transfer funds to OASDI. How the Treasury chooses to raise those funds will have tax-incidence implications. Increases in income taxes, to fill the Treasury’s general fund for payment to OASDI, will fall more heavily on upperincome households; decreases in OASDI
本文所表达的观点不一定反映联邦储备系统的官方立场。美国最大的退休计划是社会保障局的老年、遗属和残疾保险(OASDI)计划。2004年,4800万人获得了4930亿美元的福利,1.57亿需要缴纳工资税的人提供了该计划6580亿美元收入的大部分。1650亿美元的超额收入被加入到该计划的信托基金中,到2004年底,该基金的总额为1.7万亿美元。在接下来的25年里,预计OASDI计划的受益人与纳税人的比例将从目前的3.3比1下降到2.2比1左右。因此,预计在2018年左右之后,支出将持续超过收入。根据现行的税收和福利规则,并通过提取信托基金,预计所有预定的福利支付至少可以在今后25年内支付,到那时信托基金将耗尽。此后,如果福利或税收不发生变化,预计到2080年,所得税收入将足以支付约70%的计划福利支付。许多分析家(和政治家)认为这种不足是不可接受的,OASDI计划必须改变。建议包括增加工资税,降低福利水平,增加信托基金投资的收益,以及推迟新退休人员有资格获得全额福利的年龄。经济分析表明,仔细分析这些提议很重要,因为每一项提议都可能对经济中的不同群体产生不同的影响。以社会保障信托基金为例。在1983年之前,OASDI计划主要以按需付费的方式运作。该计划于1940年由国会设立,由于国会推迟了增税提议,该计划的信托基金在1983年之前几乎没有增长在1940年至1983年期间的11年中,由于福利支出超过收入,基金的水平下降了。1983年,OASDI的格林斯潘委员会建议将该计划从仅从当前收入中支付福利改为部分资助退休计划。工资税率提高了,信托基金开始增长。最近,一些分析师提出,信托基金应该寻求获得更高的回报率,以缓解未来OASDI的缺口。这个提议是有问题的,因为该基金完全由美国国债组成。直到福利金开始超过工资税收入,比如在2018年,财政部才会被要求赎回这些证券,并将资金转移到OASDI。财政部如何筹集这些资金将会影响税收。为了填补财政部支付给OASDI的一般基金,所得税的增加将更多地落在高收入家庭身上;OASDI福利的减少或工资税的增加将更多地落在低收入家庭身上因此,在未来几十年里,财政部对信托基金的更高回报率将会把解决OASDI缺口的更多负担转移给高收入家庭。现行法律严格限制了该信托基金的投资选择:该基金只能投资于由联邦政府完全信任和信用支持的证券。实际上,该基金每年购买期限从1年到15年不等的非流通国库券,收益率等于到期期限为4年或以上的国库券的平均市场收益率。2003年,该基金以3.5%的收益率买入了2100亿美元;2004年,该基金以4.6%的收益率买入了2150亿美元。一些分析师建议,该信托基金的投资应更接近私人退休体系,包括长期通胀指数证券。其中一些建议建议要求财政部向信托基金发行收益率高于市场的长期国债通胀保值证券(TIPS)。尽管存在争议,但这种改变将把解决OASDI缺口的很大一部分的税收负担从低收入家庭转移到高收入家庭。简单的计算,使用当前的收益和税收预测,表明,如果整个当前基金以大约5.5%到6%的实际票面利率投资于这种特别发行的TIPS,信托基金的耗尽日期可能会推迟到2080年。
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引用次数: 4
Does a mild recession imply a weak recovery 温和的衰退是否意味着微弱的复苏
Pub Date : 1900-01-01 DOI: 10.20955/ES.2002.9
S ome analysts have suggested that there is a statistically reliable relationship between the severity of a recession and the strength of the subsequent recovery. Specifically, the suggestion is that severe recessions are followed by robust recoveries and that mild recessions are followed by relatively weak recoveries. Because the 2001 recession appears to have been the mildest during the postWWII period, can we expect a below-average recovery? One frequently cited example that appears to support this proposition is the 1990-91 experience. That recession was very mild, and it was followed by a relatively weak and protracted recovery. The unemployment rate, for instance, peaked more than a year after the official end of the recession (March 1991). Similarly, the rather severe 1981-82 recession was followed by a robust recovery. While interesting, these examples do not constitute a significant regularity that tends to hold for all recessions and recoveries. To investigate this proposition, we analyzed data on post-WWII recessions and recoveries. According to the National Bureau of Economic Research (NBER), there have been ten postwar recessions, including the 2001 recession. One of these, the 1980 recession, was immediately followed by another, the so-called 1981-82 “double dip” recession. Because the recovery period following the 1980 recession was relatively short, we eliminated it from our analysis. We measured the severity of each recession by the decline in output, measured both by real GDP and industrial production (IP), from the NBER date of the business cycle peak to the date of the trough. Likewise, the strength of the recovery is measured by the growth in output, using the same two measures, during the year following the NBER-dated business cycle trough. A scatter plot of these data for the eight postwar recessions prior to 2001 is presented in the accompanying figure. The “lines of best fit” for both output measures indicate that there is a positive relationship between the severity of the recession (horizontal axis) and the strength of the recovery (vertical axis) as hypothesized. Using either measure, the correlation between severity of recession and strength of recovery is not statistically significant, although the relationship is somewhat stronger using IP.1 Hence, while there is a positive correlation between the severity of the recession and the strength of the recovery, this relationship alone is not strong enough that knowledge of the depth of the recession is useful for predicting the strength of the subsequent recovery. Conse quently, the mildness of this recession would appear to provide little if any guidance about the strength of the recovery.
一些分析人士认为,经济衰退的严重程度与随后复苏的力度之间存在统计学上可靠的关系。具体来说,这表明严重的衰退之后是强劲的复苏,轻微的衰退之后是相对疲弱的复苏。由于2001年的衰退似乎是二战后最温和的一次,我们能期待一次低于平均水平的复苏吗?一个经常被引用的支持这一观点的例子是1990-91年的经历。那次衰退非常温和,随之而来的是一场相对疲弱且旷日持久的复苏。例如,失业率在经济衰退正式结束(1991年3月)一年多后达到顶峰。同样,在1981-82年相当严重的衰退之后,出现了强劲的复苏。尽管这些例子很有趣,但它们并不构成适用于所有衰退和复苏的重要规律。为了研究这一命题,我们分析了二战后经济衰退和复苏的数据。根据美国国家经济研究局(NBER)的数据,战后共发生了10次经济衰退,包括2001年的经济衰退。其中一次,即1980年的经济衰退,紧随其后的是另一次,即所谓的1981-82年的“双底”衰退。由于1980年经济衰退后的恢复期相对较短,我们将其从分析中剔除。我们通过产出的下降来衡量每次衰退的严重程度,用实际GDP和工业生产(IP)来衡量,从国家经济研究局的商业周期高峰日期到低谷日期。同样,经济复苏的力度是通过产出的增长来衡量的,使用同样的两种衡量标准,在nber记录的商业周期低谷之后的一年里。附图显示了2001年之前战后8次衰退的数据散点图。两种产出指标的“最佳拟合线”表明,正如假设的那样,衰退的严重程度(横轴)和复苏的强度(纵轴)之间存在正相关关系。使用任何一种测量方法,经济衰退的严重程度和经济复苏的强度之间的相关性在统计上都不显著,尽管使用IP.1的关系更强一些。因此,虽然经济衰退的严重程度和经济复苏的强度之间存在正相关,但这种关系本身还不够强,不足以使对经济衰退深度的了解对预测随后的经济复苏的强度有用。因此,这次经济衰退的温和程度似乎对经济复苏的力度几乎没有任何指导作用。
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引用次数: 0
Local income inequality 地方收入不平等
Pub Date : 1900-01-01 DOI: 10.20955/es.2008.31
Rubén Hernández-Murillo
A lthough national income inequality is a subject of great concern in the popular press and in political rhetoric, income inequality at the local level is more evident because inequality tends to be much higher in densely populated areas; consequently, some economists focus their attention there. The chart shows a correlation of 45 percent between county-level income inequality and population density for 2007. Differ ences in local inequality reflect, for the most part, three important factors: differences in the distribution of job skills, differences in the returns that individuals gain from their skills, and differences in government policies. Economists Glaeser, Resseger, and Tobio find that almost one half of the variation in income inequality across metropolitan areas can be explained by differences in the distribution of skills.1 They identify two reasons for this: First, particularly at the medium and high skill levels, the differences in skills observed today can be explained largely by the historical patterns from several decades ago; in other words, historical patterns of skill level are very persistent. Second, where people choose to live, especially those with lower skill levels, affects the distribution of skills: For example, recent Hispanic immigrants have disproportionately lower skill levels than immigrants from other ethnic backgrounds and lower skill levels than immigrants from previous decades. Historical patterns are also important in this case because many Hispanic immigrants often locate in the same areas of the country—those geographically close to Latin America, such as California, Texas, and Florida. Inequality across cities also reflects differences in the returns to skill, although it is not clear why skill is rewarded more in some places than others. One potential explanation is that densely populated areas generate human capital spillovers (i.e., the sharing or passing on of skills) because of the concentration of skilled individuals working together, which causes the returns to rise. Economists also recognize that highly skilled individuals are sensitive to differences in these returns and can easily migrate to those places where their skills are valued more. Differences in government policies also explain some of the variation in income inequality. However, the high mobility of more skilled, and consequently richer, individuals severely limits the ability of local governments to reduce inequality by redistributing wealth: As noted, the richer and highly skilled will move if returns to skill decline. Communities with more generous redistributive policies, in the form of welfare programs, also affect the location patterns of less skilled immigrants and will tend to attract more poor individuals. Glaeser, Resseger, and Tobio suggest that education policies to improve the skill levels of individuals at the bottom of the distribution might be more effective at reducing inequality than redistributive policies. They warn
虽然国民收入不平等是大众媒体和政治修辞中非常关注的一个主题,但地方一级的收入不平等更为明显,因为在人口稠密的地区,不平等往往要高得多;因此,一些经济学家把注意力集中在那里。图表显示,2007年县级收入不平等与人口密度之间的相关性为45%。在很大程度上,地方不平等的差异反映了三个重要因素:工作技能分配的差异,个人从技能中获得的回报的差异,以及政府政策的差异。经济学家格莱泽(Glaeser)、雷塞格(Resseger)和托比奥(Tobio)发现,大都市地区收入不平等的变化几乎有一半可以用技能分配的差异来解释他们发现了两个原因:首先,特别是在中等和高技能水平上,今天观察到的技能差异在很大程度上可以用几十年前的历史模式来解释;换句话说,技能水平的历史模式是非常持久的。其次,人们选择居住的地方,尤其是那些技能水平较低的人,会影响技能的分布:例如,最近的西班牙裔移民的技能水平不成比例地低于其他种族背景的移民,也低于前几十年的移民。在这种情况下,历史模式也很重要,因为许多西班牙裔移民经常居住在该国相同的地区——那些地理上接近拉丁美洲的地区,如加利福尼亚、德克萨斯和佛罗里达。城市之间的不平等也反映了技能回报的差异,尽管目前尚不清楚为什么某些地方的技能回报高于其他地方。一种可能的解释是,人口稠密的地区会产生人力资本溢出效应(即技能的分享或传递),因为有技能的人聚集在一起工作,从而导致回报上升。经济学家还认识到,高技能的个人对这些回报的差异很敏感,可以很容易地迁移到那些他们的技能更受重视的地方。政府政策的差异也解释了收入不平等的一些差异。然而,高技能人才的高流动性严重限制了地方政府通过财富再分配来减少不平等的能力:如上所述,如果技能回报下降,富人和高技能人才会迁移。拥有更慷慨的再分配政策的社区,以福利计划的形式,也会影响低技能移民的位置模式,并倾向于吸引更多的穷人。格莱泽、雷塞格和托比奥认为,提高收入分配底层个人技能水平的教育政策可能比再分配政策更能有效地减少不平等。然而,他们警告称,改变人力资本的分配,即使不需要几十年,也需要几年时间。更重要的是,他们指出,由于美国的教育体系分散,学校由地方政府管理,要想在城市之间实现教育机会均等,就需要国家和地方政府之间进行协调,这可能会很困难,而且代价高昂。
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引用次数: 1
Labor's share 工党的分享
Pub Date : 1900-01-01 DOI: 10.20955/ES.2004.20
Michael R. Pakko
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引用次数: 9
Twist and shout, or back to the sixties 扭来扭去喊去,不然就回到六十年代
Pub Date : 1900-01-01 DOI: 10.20955/es.2005.7
James Bullard
Views expressed do not necessarily reflect official positions of the Federal Reserve System. The Federal Open Market Committee (FOMC) has increased the target federal funds rate at each meeting since June 2004, to 2.5 percent following the February 2005 meeting. A puzzling aspect of recent financial market developments has been that, despite the rise of 150 basis points in the Fed’s target rate, longer-term rates have remained roughly constant. In recent testimony, Fed Chairman Alan Greenspan commented extensively on this issue, eventually concluding that the market behavior “remains a conundrum.”1 There was a time when this same behavior would not have been considered so unusual. It occurred in the early 1960s, a cherished era among monetary economists and policymakers. That era sported relatively rapid growth in both real output and productivity, low inflation rates, and low rates of interest, not unlike the present day. Although many years have passed since that time, the intervening years have been associated with higher inflation—at times substantially higher—and have been dominated by Federal Reserve efforts to move inflation lower and build credibility for continued low inflation. The low level of inflation and high level of Fed credibility characteristic of the early 1960s returned in the early 2000s. Thus, the early 1960s may give a better indication of the nature of today’s financial markets than most of the intervening years. The chart shows the evolution of shortand longerterm interest rates during the 38 months following the last month of the recession relevant to each era. The most recent recession ended in November 2001, while for the earlier era it ended in February 1961. The chart shows the effective federal funds rate along with the longer-term 10-year Treasury note yield. The most striking characteristic is that in both eras, once the federal funds rate began rising following the recession, the longer-term bond yield remained anchored near 4 percent. One explanation is that, in both eras, the private sector viewed movements in short-term interest rates as exactly those necessary to keep inflation low and steady, so that longer-term inflation expectations and hence longer-term bond yields could remain anchored. Similarities in the interest rate environment may also be attributable in part to similarities in economic performance. The average annualized quarterly growth rates of key variables were a lot alike during 2002:Q1 to 2004:Q4 as compared with the corresponding 1961:Q2 to 1964:Q4 period. Average nonfarm business sector productivity growth, for instance, was almost identical during the two periods, 3.90 percent today versus 3.80 percent in the early 1960s. Inflation rates were similar as well, with the core consumer price index increasing, on average, 1.80 percent during the current period versus 1.40 percent during the earlier era. Real output growth was robust in both periods as well, 3.50 percent in the early 2000s versu
本文所表达的观点不一定反映联邦储备系统的官方立场。自2004年6月以来,联邦公开市场委员会(FOMC)在每次会议上都将联邦基金目标利率上调,2005年2月会议后上调至2.5%。最近金融市场发展的一个令人困惑的方面是,尽管美联储的目标利率上升了150个基点,但长期利率却基本保持不变。在最近的证词中,美联储主席艾伦·格林斯潘(Alan Greenspan)对这个问题发表了广泛的评论,最终得出结论,市场行为“仍然是一个难题”。在过去,这种行为并不会被认为是不寻常的。它发生在20世纪60年代初,这是货币经济学家和政策制定者所珍视的时代。那个时代的实际产出和生产率增长相对较快,通货膨胀率较低,利率也较低,与今天没有什么不同。尽管从那时起已经过去了许多年,但其间的几年一直伴随着更高的通胀——有时高得多——美联储一直在努力降低通胀,并为持续的低通胀建立信誉。上世纪60年代初的低通胀水平和美联储高可信度特征在本世纪初重现。因此,20世纪60年代早期可能比中间的大多数年份更能说明当今金融市场的性质。该图显示了与每个时代相关的衰退最后一个月后的38个月内短期和长期利率的演变。最近一次衰退结束于2001年11月,而前一次衰退结束于1961年2月。该图显示了有效联邦基金利率以及长期10年期美国国债收益率。最显著的特征是,在这两个时期,一旦联邦基金利率在衰退后开始上升,长期债券收益率仍稳定在4%附近。一种解释是,在这两个时代,私人部门都认为短期利率的变动正是保持低通胀和稳定所必需的,这样长期通胀预期和长期债券收益率才能保持稳定。利率环境的相似也可能部分归因于经济表现的相似。在2002年第一季度至2004年第四季度期间,关键变量的平均年化季度增长率与相应的1961年第二季度至1964年第四季度期间非常相似。例如,在这两个时期,非农部门的平均生产率增长几乎相同,今天是3.90%,而上世纪60年代初是3.80%。通货膨胀率也相似,核心消费者价格指数平均上涨,当前时期为1.80%,而早先时期为1.40%。这两个时期的实际产出增长都很强劲,21世纪初为3.50%,而20世纪60年代初为5.40%。20世纪60年代的经济扩张是有记录以来持续时间最长的一次,一直持续到1969年12月,当时出现了一场相对温和的衰退。在20世纪60年代后半期,通货膨胀开始意外上升,为接下来动荡的十年经济埋下了伏笔。今天的联邦公开市场委员会是否会像上世纪60年代那样实现扩张还有待观察,但考虑到类似的通胀水平和美联储的可信度,这个时代可能是一个值得学习的好时代。
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引用次数: 0
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National Economic Trends
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