Showing papers in "National Bureau of Economic Research in 2010"

The Economics of International Differences in Educational Achievement. NBER Working Paper No. 15949.

Abstract: An emerging economic literature over the past decade has made use of international tests of educational achievement to analyze the determinants and impacts of cognitive skills. The cross-country comparative approach provides a number of unique advantages over national studies: It can exploit institutional variation that does not exist within countries; draw on much larger variation than usually available within any country; reveal whether any result is country-specific or more general; test whether effects are systematically heterogeneous in different settings; circumvent selection issues that plague within-country identification by using system-level aggregated measures; and uncover general-equilibrium effects that often elude studies in a single country. The advantages come at the price of concerns about the limited number of country observations, the cross-sectional character of most available achievement data, and possible bias from unobserved country factors like culture. This chapter reviews the economic literature on international differences in educational achievement, restricting itself to comparative analyses that are not possible within single countries and placing particular emphasis on studies trying to address key issues of empirical identification. While quantitative input measures show little impact, several measures of institutional structures and of the quality of the teaching force can account for significant portions of the large international differences in the level and equity of student achievement. Variations in skills measured by the international tests are in turn strongly related to individual labor-market outcomes and, perhaps more importantly, to cross-country variations in economic growth.

The Labor Market in the Great Recession

Abstract: From the perspective of a wide range of labor market outcomes, the recession that began in 2007 represents the deepest downturn in the postwar era. Early on, the nature of labor market adjustment displayed a notable resemblance to that observed in past severe downturns. During the latter half of 2009, however, the path of adjustment exhibited important departures from that seen during and after prior deep recessions. Recent data point to two warning signs going forward. First, the record rise in long-term unemployment may yield a persistent residue of long-term unemployed workers with weak search effectiveness. Second, conventional estimates suggest that the extension of Emergency Unemployment Compensation may have led to a modest increase in unemployment. Despite these forces, we conclude that the problems facing the U.S. labor market are unlikely to be as severe as the European unemployment problem of the 1980s.

Skills, Tasks and Technologies: Implications for Employment and Earnings. NBER Working Paper No. 16082.

Abstract: A central organizing framework of the voluminous recent literature studying changes in the returns to skills and the evolution of earnings inequality is what we refer to as the canonical model, which elegantly and powerfully operationalizes the supply and demand for skills by assuming two distinct skill groups that perform two different and imperfectly substitutable tasks or produce two imperfectly substitutable goods. Technology is assumed to take a factor-augmenting form, which, by complementing either high or low skill workers, can generate skill biased demand shifts. In this paper, we argue that despite its notable successes, the canonical model is largely silent on a number of central empirical developments of the last three decades, including: (1) significant declines in real wages of low skill workers, particularly low skill males; (2) non-monotone changes in wages at different parts of the earnings distribution during different decades; (3) broad-based increases in employment in high skill and low skill occupations relative to middle skilled occupations (i.e., job "polarization"); (4) rapid diffusion of new technologies that directly substitute capital for labor in tasks previously performed by moderately skilled workers; and (5) expanding offshoring in opportunities, enabled by technology, which allow foreign labor to substitute for domestic workers specific tasks. Motivated by these patterns, we argue that it is valuable to consider a richer framework for analyzing how recent changes in the earnings and employment distribution in the United States and other advanced economies are shaped by the interactions among worker skills, job tasks, evolving technologies, and shifting trading opportunities. We propose a tractable task-based model in which the assignment of skills to tasks is endogenous and technical change may involve the substitution of machines for certain tasks previously performed by labor. We further consider how the evolution of technology in this task-based setting may be endogenized. We show how such a framework can be used to interpret several central recent trends, and we also suggest further directions for empirical exploration.

Recruiting for Ideas: How Firms Exploit the Prior Inventions of New Hires

Abstract: When firms recruit inventors, they acquire not only the use of their skills but also enhanced access to their stock of ideas. But do hiring firms actually increase their use of the new recruits' prior inventions? Our estimates suggest they do, quite significantly in fact, by approximately 202% on average. However, this does not necessarily reflect widespread "learning-by-hiring." In fact, we estimate that a recruit's exploitation of her own prior ideas accounts for almost half of the above effect. Furthermore, although one might expect the recruit's role to diminish rapidly as her tacit knowledge diffuses across her new firm, our estimates indicate that her importance is surprisingly persistent over time. We base these findings on an empirical strategy that exploits the variation over time in hiring firms' citations to the recruits' pre-move patents. Specifically, we employ a difference-in-differences approach to compare pre-move versus post-move citation rates for the recruits' prior patents and the corresponding matched-pair control patents. Our methodology has three benefits compared to previous studies that also examine the link between labor mobility and knowledge flow: 1) it does not suffer from the upward bias inherent in the conventional cross-sectional comparison, 2) it generates results that are robust to a more stringently matched control sample, and 3) it enables a temporal examination of knowledge flow patterns.

Yesterday's Heroes: Compensation and Creative Risk-Taking

Abstract: We study the relationship between compensation and risk-taking among finance firms using a neglected insight from principal-agent contracting with hidden action and risk-averse agents. If the sensitivity of pay to stock price or slope does not vary with stock price volatility, then total compensation has to increase with firm risk to satisfy as agent's individual rationality constraint. Consistent with this hypothesis, we find a correlation between total executive compensation, controlling for firm size, and risk measures such as firm beta, return volatility, and exposure to the ABX sub-prime index. There is no relationship between insider ownership, a proxy for slope, and these measures. Compensation and firm risk are not related to governance variables. They increasewith institutional investor ownership, which suggests that heterogeneous investors incentivize firms to take varying levels of risks. Our results hold for non-finance firms and point to newprincipal-agent contracting empirics.

Subjective Well-Being, Income, Economic Development and Growth

Abstract: We explore the relationships between subjective well-being and income, as seen across individuals within a given country, between countries in a given year, and as a country grows through time. We show that richer individuals in a given country are more satisfied with their lives than are poorer individuals, and establish that this relationship is similar in most countries around the world. Turning to the relationship between countries, we show that average life satisfaction is higher in countries with greater GDP per capita. The magnitude of the satisfaction-income gradient is roughly the same whether we compare individuals or countries, suggesting that absolute income plays an important role in influencing well-being. Finally, studying changes in satisfaction over time, we find that as countries experience economic growth, their citizens’ life satisfaction typically grows, and that those countries experiencing more rapid economic growth also tend to experience more rapid growth in life satisfaction. These results together suggest that measured subjective well-being grows hand in hand with material living standards. JEL-Code: O11, I31, I32.

Measure for Measure: The Relationship between Measures of Instructional Practice in Middle School English Language Arts and Teachers' Value-Added Scores. NBER Working Paper No. 16015.

Abstract: Over the past 2 years, educational policy makers have focused much of their attention on issues related to teacher effectiveness. The Obama administration has made teacher evaluation and teacher quality a central feature of many of its educational policies, including Race to the Top (RTTT), Investing in Innovation (i3), and the Teacher Incentive Fund (TIF) grants. In response, many states and school districts are developing measures of teacher effectiveness to reward, tenure, support, and fire teachers. In response to these policies, many observers are raising questions and concerns about the measures of teacher effectiveness that inform high-stakes personnel decisions. Unfortunately, we have little systematic knowledge regarding the properties of most of these measures. This article has two goals: to explore elements of instruction that may be associated with improved student achievement and to examine the domains of teaching skills that are identified in the literature as important to high-quality teaching but that may not be highly correlated with value-added measures of teacher effectiveness.

Energy, the Environment, and Technological Change

Abstract: Within the field of environmental economics, the role of technological change has received much attention The long-term nature of many environmental problems, such as climate change, makes understanding the evolution of technology an important part of projecting future impacts Moreover, in many cases, environmental problems cannot be addressed, or can only be addressed at great cost, using existing technologies Providing incentives to develop new environmentally friendly technologies then becomes a focus of environmental policy This chapter reviews the literature on technological change and the environment Our goals are to introduce technological change economists to how the lessons of the economics of technological change have been applied in the field of environmental economics, and suggest ways in which scholars of technological change could contribute to the field of environmental economics

The Credibility Revolution in Empirical Economics: How Better Research Design is Taking the Con out of Econometrics. NBER Working Paper No. 15794.

Abstract: This essay reviews progress in empirical economics since Leamer's (1983) critique. Leamer highlighted the benefits of sensitivity analysis, a procedure in which researchers show how their results change with changes in specification or functional form. Sensitivity analysis has had a salutary but not a revolutionary effect on econometric practice. As we see it, the credibility revolution in empirical work can be traced to the rise of a design-based approach that emphasizes the identification of causal effects. Design-based studies typically feature either real or natural experiments and are distinguished by their prima facie credibility and by the attention investigators devote to making the case for a causal interpretation of the findings their designs generate. Design-based studies are most often found in the microeconomic fields of Development, Education, Environment, Labor, Health, and Public Finance, but are still rare in Industrial Organization and Macroeconomics. We explain why IO and Macro would do well to embrace a design-based approach. Finally, we respond to the charge that the design-based revolution has overreached.

The Rug Rat Race

Abstract: After three decades of decline, the amount of time spent by parents on childcare in the U.S. began to rise dramatically in the mid-1990s. Moreover, the rise in childcare time was particularly pronounced among college-educated parents. Why would highly educated parents increase the amount of time they allocate to childcare at the same time that their own market returns have skyrocketed? After finding no empirical support for standard explanations, such as selection or income effects, we offer a new explanation. We argue that increased competition for college admissions may be an important source of these trends. The number of college-bound students has surged in recent years, coincident with the rise in time spent on childcare. The resulting “cohort crowding” has led parents to compete more aggressively for college slots by spending increasing amounts of time on college preparation. Our theoretical model shows that, since college-educated parents have a comparative advantage in college preparation, rivalry leads them to increase preparation time by a greater amount than less-educated parents. We provide empirical support for our explanation with a comparison of trends between the U.S. and Canada, and a comparison of college competition and childcare time across U.S. states.

The Euro and Firm Restructuring

Abstract: We test whether and how the adoption of the euro, narrowly defined as the end of competitive devaluations, has affected member states' productive structures, distinguishing between within and across sector reallocation. We find evidence that the euro has been accompanied by a reallocation of activity within rather than across sectors. Since its adoption, productivity growth has been relatively stronger in country-sectors that once relied more on competitive devaluations to regain price competitiveness. This effect is robust to potential omitted-variable bias and correlated effects. Firm-level evidence from Italian manufacturing confirms that low-tech businesses, which arguably benefitted most from devaluations, have been restructuring more since the adoption of the euro. Restructuring has entailed a shift of business focus from production to upstream and downstream activities, such as product design, advertising, marketing and distribution, and a corresponding reduction in the share of blue collar workers.(This abstract was borrowed from another version of this item.)

Are Leading Indicators of Financial Crises Useful for Assessing Country Vulnerability? Evidence from the 2008-09 Global Crisis

Abstract: This paper investigates whether leading indicators can help explain the cross-country incidence of the 2008-09 financial crisis. Rather than looking for indicators with specific relevance to the current crisis, the selection of variables is driven by an extensive review of more than eighty papers from the previous literature on early warning indicators. The review suggests that central bank reserves and past movements in the real exchange rate are the two leading indicators that have proven the most useful in explaining crisis incidence across different countries and crises in the past. For the 2008-09 crisis, we use six different variables to measure crisis incidence: drops in GDP and industrial production, currency depreciation, stock market performance, reserve losses, or participation in an IMF program. We find that the level of reserves in 2007 appears as a consistent and statistically significant leading indicator of the current crisis, in line with the conclusions of the earlier literature. In addition to reserves, recent real appreciation is a statistically significant predictor of devaluation and of a measure of exchange market pressure during the current crisis. That our data on the crisis period include the first quarter of 2009 may explain why we find stronger results than earlier papers such as Obstfeld, Shambaugh and Taylor (2009, 2010) and Rose and Spiegel (2009a,b).

The State of the Safety Net in the Post-Welfare Reform Era

Abstract: The 1996 welfare reform led to sweeping changes to the central cash safety net program for families with children. Along with other changes, the reform imposed lifetime time limits for receipt of cash welfare, effectively ending its entitlement nature for these families. Despite dire predictions, previous research has shown that program caseloads declined and employment increased, with no detectible increase in poverty or worsening of child well-being. We reevaluate these results in light of the severe 2007-09 recession. In particular, we examine how welfare reform has altered the cyclicality of the response of caseloads and family well-being. We find that use of food stamps and noncash safety net program participation have become significantly more responsive to the economic cycle after welfare reform, rising more when unemployment increases. By contrast, we find no evidence that cash welfare for families with children is more responsive, and some evidence that it might be less so. We find some evidence that poverty increases more with increases in the unemployment rate after reform, and none that it increases less. We find no significant effects of reform on the cyclical responsiveness of food consumption, food insecurity, health insurance, household crowding, or health.

Modeling Inflation After the Crisis

Abstract: In the United States, the rate of price inflation falls in recessions. Turning this observation into a useful inflation forecasting equation is difficult because of multiple sources of time variation in the inflation process, including changes in Fed policy and credibility. We propose a tightly parameterized model in which the deviation of inflation from a stochastic trend (which we interpret as long-term expected inflation) reacts stably to a new gap measure, which we call the unemployment recession gap. The short-term response of inflation to an increase in this gap is stable, but the long-term response depends on the resilience, or anchoring, of trend inflation. Dynamic simulations (given the path of unemployment) match the paths of inflation during post-1960 downturns, including the current one.

Agriculture, Roads, and Economic Development in Uganda

Abstract: A large fraction of Uganda's population continues to earn a living from quasi-subsistence agriculture. This paper uses a static general equilibrium model to explore the relationships between high transportation costs, low productivity, and the size of the quasi-subsistence sector. We parameterize the model to replicate some key features of the Ugandan data, and we then perform a series of quantitative experiments. Our results suggest that the population in quasi-subsistence agriculture is highly sensitive both to agricultural productivity levels and to transportation costs. The model also suggests positive complementarities between improvements in agricultural productivity and transportation.

Do Competitive Work Places Deter Female Workers? A Large-Scale Natural Field Experiment on Gender Differences in Job-Entry Decisions

Abstract: Recently an important line of research using laboratory experiments has provided a new potential reason for why we observe gender imbalances in labor markets: men are more competitively inclined than women. Whether, and to what extent, such preferences yield differences in naturally-occurring labor market outcomes remains an open issue. We address this question by exploring job-entry decisions in a natural field experiment where we randomized nearly 7,000 interested job-seekers into different compensation regimes. By varying the role that individual competition plays in setting the wage, we are able to explore whether competition, by itself, can cause differential job entry. The data highlight the power of the compensation regime in that women disproportionately shy away from competitive work settings. Yet, there are important factors that attenuate the gender differences, including whether the job is performed in teams, whether the job task is female-oriented, and the local labor market.

The Increase in Income Cyclicality of High-Income Households and its Relation to the Rise in Top Income Shares

Abstract: We document a large increase in the cyclicality of the incomes of high-income households, coinciding with the rise in their share of aggregate income. In the United States, since top income shares began to rise rapidly in the early 1980s, incomes of those in the top 1 percent of the income distribution have averaged 14 times average income and been 2.4 times more cyclical. Before the early 1980s, incomes of the top 1 percent were slightly less cyclical than average. The increase in cyclicality at the top is to a large extent due to increases in the share and the cyclicality of their earned income. The high cyclicality among top incomes is found for households without stock options; following the same households over time; for post-tax, post-transfer income; and for consumption. We study cyclicality throughout the income distribution and reconcile our findings with earlier work. Furthermore, greater top income share is associated with greater top income cyclicality across recent decades, across subgroups of top income households, and, in changes, across countries. This suggests a common cause. We show theoretically that increases in the production scale of the most talented can raise both top incomes and their cyclicality.

Unwilling or unable to cheat? evidence from a randomized tax audit experiment in Denmark

Abstract: This paper analyzes a randomized tax enforcement experiment in Denmark. In the base year, a stratified and representative sample of over 40,000 individual income tax filers was selected for the experiment. Half of the tax filers were randomly selected to be thoroughly audited, while the rest were deliberately not audited. The following year, "threat-of-audit" letters were randomly assigned and sent to tax filers in both groups. Using comprehensive administrative tax data, we present four main findings. First, we find that the tax evasion rate is very small (0.3) for income subject to third-party reporting, but substantial (37) for self-reported income. Since 95 of all income is third-party reported, the overall evasion rate is very modest. Second, using bunching evidence around large and salient kink points of the nonlinear income tax schedule, we find that marginal tax rates have a positive impact on tax evasion, but that this effect is small in comparison to avoidance responses. Third, we find that prior audits substantially increase self-reported income, implying that individuals update their beliefs about detection probability based on experiencing an audit. Fourth, threat-of-audit letters also have a significant effect on self-reported income, and the size of this effect depends positively on the audit probability expressed in the letter. All these empirical results can be explained by extending the standard model of (rational) tax evasion to allow for the key distinction between self-reported and third-party reported incomes.

African Poverty is Falling...Much Faster than You Think

Abstract: The conventional wisdom that Africa is not reducing poverty is wrong. Using the methodology of Pinkovskiy and Sala-i-Martin (2009), we estimate income distributions, poverty rates, and inequality and welfare indices for African countries for the period 1970-2006. We show that: (1) African poverty is falling and is falling rapidly; (2) if present trends continue, the poverty Millennium Development Goal of halving the proportion of people with incomes less than one dollar a day will be achieved on time; (3) the growth spurt that began in 1995 decreased African income inequality instead of increasing it; (4) African poverty reduction is remarkably general: it cannot be explained by a large country, or even by a single set of countries possessing some beneficial geographical or historical characteristic. All classes of countries, including those with disadvantageous geography and history, experience reductions in poverty. In particular, poverty fell for both landlocked as well as coastal countries; for mineral-rich as well as mineral-poor countries; for countries with favorable or with unfavorable agriculture; for countries regardless of colonial origin; and for countries with below- or above-median slave exports per capita during the African slave trade.

Monetary science, fiscal alchemy

Abstract: Monetary policy decisions tend to be based on systematic analysis of alternative policy choices and their associated macroeconomic impacts: this is science. Fiscal policy choices, in contrast, spring from unsystematic speculation, grounded more in politics than economics: this is alchemy. In normal times, fiscal alchemy poses no insurmountable problems for monetary policy because fiscal expectations can be extrapolated from past fiscal behavior. But normal times may be coming to an end: aging populations are causing promised government old-age benefits to grow relentlessly and many governments have no plans for financing the benefits. In this era of fiscal stress, fiscal expectations are unanchored and fiscal alchemy creates unnecessary uncertainty and can undermine the ability of monetary policy to control inflation and influence real economic activity in the usual ways.

Out-of-Pocket Spending in the Last Five Years of Life

Abstract: BACKGROUND A key objective of the Medicare program is to reduce risk of financial catastrophe due to out-of-pocket healthcare expenditures. Yet little is known about cumulative financial risks arising from out-of-pocket healthcare expenditures faced by older adults, particularly near the end of life.

The Effect of Civilian Casualties in Afghanistan and Iraq

Abstract: A central question in intrastate conflicts is how insurgents are able to mobilize supporters to participate in violent and risky activities. A common explanation is that violence committed by counterinsurgent forces mobilizes certain segments of the population through a range of mechanisms. We study the effects of civilian casualties in Iraq and Afghanistan to quantify the effect of such casualties on subsequent insurgent violence. By comparing uniquely detailed micro-data along temporal, spatial, and gender dimensions we can distinguish short-run 'information' and 'capacity' effects from the longer run 'propaganda' and 'revenge' effects. In Afghanistan we find strong evidence that local exposure to civilian casualties caused by international forces leads to increased insurgent violence over the long-run, what we term the 'revenge' effect. Matching districts with similar past trends in violence shows that counterinsurgent-generated civilian casualties from a typical incident are responsible for 1 additional violent incident in an average sized district in the following 6 weeks and lead to increased violence over the next 6 months. There is no evidence that out-of-area events--errant air strikes for example--lead to increased violence, nor is there evidence of short run effects, thus ruling out the propaganda, information, and capacity mechanisms. Critically, we find no evidence of a similar reaction to civilian casualties in Iraq, suggesting the constraints on insurgent production of violence may be quite conflict-specific. Our results imply that minimizing harm to civilians may indeed help counterinsurgent forces in Afghanistan to reduce insurgent recruitment.

The Mommy Track Divides: The Impact of Childbearing on Wages of Women of Differing Skill Levels

Abstract: This paper explores how the wage and career consequences of motherhood differ by skill and timing. Past work has often found smaller or even negligible effects from childbearing for high-skill women, but we find the opposite. Wage trajectories diverge sharply for high scoring women after, but not before, they have children, while there is little change for low-skill women. It appears that the lifetime costs of childbearing, especially early childbearing, are particularly high for skilled women. These differential costs of childbearing may account for the far greater tendency of high-skill women to delay or avoid childbearing altogether.