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You Can't Take It with You? Immigrant Assimilation and the Portability of Human Capital

Journal of Labor Economics 2000 18(2), 221-251
The national origin of an individual's human capital is a crucial determinant of its value. Education and labor market experience acquired abroad are significantly less valued than human capital obtained domestically. This difference can fully explain the earnings disadvantage of immigrants relative to comparable natives in Israel. Variation in the return to foreign schooling across origin countries may reflect differences in its quality and compatibility with the host labor market. The return to foreign experience is generally insignificant. Acquiring additional education following immigration appears to confer a compound benefit by raising the return to education acquired abroad.

An Empirical Model of Sectoral Movements by Unemployed Workers

Journal of Labor Economics 1996 14(1), 126-153
Using Canadian data, I investigate the relationships among sectoral mobility, unemployment spells, and total unemployment. Recent North American evidence suggests that incidence shifts toward high wage-high tenure workers may increase equilibrium unemployment through decreasing sectoral mobility and increasing spells. Using a multiple spell transition model, I find that, while shifts toward such workers may have these effects, composition changes that lead to higher mobility can also increase unemployment. A further investigation into the relative roles of mobility and spell lengths in driving total unemployment indicates that the influence of the former is comparatively small.

Do Firms Pay Efficiency Wages? Evidence with Data at the Firm Level

Journal of Labor Economics 1993 11(3), 442-470
This study tests the efficiency wage hypothesis by estimating wage and quit equations with data from the Employment Opportunity Pilot Project survey of firms. An efficiency wage model is derived that predicts effects of turnover costs and unemployment on wages as functions of first and second derivatives from the quit equation. The model is tested by examining the relationships between the coefficients in the wage and quit equations; the results are generally favorable to efficiency wage theory. Other important findings are that firm characteristics raising workers' productivity tend to raise wages and that a rise in turnover costs reduces quits.

Why are Wages Cyclical in the 1970s?

Journal of Labor Economics 1990 8(1, Part 1), 16-47 open access
This article investigates cyclicality in real wages between 1969 and 1982, using Panel Study of Income Dynamics data. There is little evidence that movements in and out of the labor market induced aggregate wage cyclicality during these years. However, cyclicality in the movement of workers between heterogeneous labor-market sectors affected aggregate wage cyclicality. While sector location is important, sector selectivity is not correlated with wages. Yet, even within sectors, cyclicality is present in real wages over this time period and is the result of cyclicality in overall wage levels, as well as in the coefficients associated with particular worker characteristics.

Simultaneously Modeling the Supply of Weeks and Hours of Work among Female Household Heads

Journal of Labor Economics 1988 6(2), 177-204
This paper explores the differential nature of labor-supply decisions regarding weeks of work per year and hours of work per week among female household heads. A model of labor supply that separates the weeks/hours decision is presented and estimated, allowing for simultaneity in the weeks/hours decision, as well as for the presence of either fixed costs or weeks and hours constraints. The results indicate that not only are weeks and hours decisions separate from the labormarket participation decision, but they are also quite different from each other, although they appear to be simultaneously determined.

A Test of Lazear's Theory of Delayed Payment Contracts

Journal of Labor Economics 1987 5(4, Part 2), S153-S170
According to Lazear, workers and firms enter into long-term implicit contracts that discourage shirking and malfeasance by shifting compensation to the end of the contract. Such "delayed payment" contracts are less likely to occur in jobs in which it is comparatively simple to monitor worker effort. This paper uses data from the National Longitudinal Survey and the Dictionary of Occupational Titles to test that hypothesis. In particular, it tests whether jobs that involve repetitive tasks tend to be characterized by an absence of pensions, mandatory retirement, long job tenures, and high wages for older workers.

Finance companies in Mexico: Unexpected victims of the global liquidity crunch

Journal of Financial Stability 2015 18, 33-54
We study the connection between the global liquidity crisis and the severe credit crunch experienced by finance companies (SOFOLES) in Mexico using firm-level data between 2001 and 2011. Our results provide supporting evidence that, as a result of the liquidity shock, SOFOLES faced severely restricted access to their main funding sources (commercial bank loans, loans from other organizations, and public debt markets). After controlling for the potential endogeneity of their funding, we find that the liquidity shock explains 64 percent of SOFOLES’ credit contraction during the recent financial crisis (2008–2009). We use our estimates to disentangle supply from demand factors as determinants of the credit contraction. After controlling for the large decline in loan demand during the financial crisis, our findings suggest that supply factors (such as nonperforming loans and lower liquidity buffers) also played a significant role. Finally, we find that financial deregulation implemented in 2006 may have amplified the effects of the global liquidity shock.

Optimal Value and Growth Tilts in Long-Horizon Portfolios

Review of Finance 2011 15(1), 29-74 open access
We develop an analytical solution to the dynamic portfolio choice problem of an investor with power utility defined over wealth at a finite horizon, who faces a time-varying investment opportunity set, parameterized using a flexible vector autoregression. We apply this framework to study the horizon effects in the allocations of equity-only investors, who hold a mix of value and growth indices, and a more general investor, who also has access to Treasury bills and bonds. We find that the mean allocation of equity-only investors is heavily tilted towards value stocks at short-horizons, but the magnitude of this tilt declines dramatically with the investment horizon, implying that growth is less risky than value at long horizons. Investors with access to bills and bonds exhibit similar behavior, when value and growth tilts are computed relative to the total equity allocation of the portfolio. However, after accounting for the propensity of these investors to increase their total equity allocation as the horizon increases, the mean value tilt of the optimal allocation is shown to be positive and stable across time.

Non-Linear Value-at-Risk

Review of Finance 1999 2(2), 161-187
Value-at-risk methods which employ a linear (“delta only”) approximation to the relation between instrument values and the underlying risk factors are unlikely to be robust when applied to portfolios containing non-linear contracts such as options. The most widely used alternative to the delta-only approach involves revaluing each contract for a large number of simulated values of the underlying factors. In this paper we explore an alternative approach which uses a quadratic approximation to the relation between asset values and the risk factors. This method (i) is likely to be better adapted than the linear method to the problem of assessing risk in portfolios containing non-linear assets, (ii) is less computationally intensive than simulation using full-revaluation and (iii) in common with the delta-only method, operates at the level of portfolio characteristics (deltas and gammas) rather than individual instruments.

International Trade Theory in Vintage Models

Review of Economic Studies 1976 43(1), 99
Journal Article International Trade Theory in Vintage Models Get access M. A. M. Smith M. A. M. Smith London School of Economics Search for other works by this author on: Oxford Academic Google Scholar The Review of Economic Studies, Volume 43, Issue 1, February 1976, Pages 99–113, https://doi.org/10.2307/2296604 Published: 01 February 1976 Article history Received: 01 June 1974 Accepted: 01 April 1975 Published: 01 February 1976