Yongseok Shin

Financial Frictions and the Persistence of History: A Quantitative Exploration

We quantitatively analyze the role of financial frictions and resource misallocation in explaining development dynamics. Our model economy with financial frictions converges to the new steady state slowly after a reform triggers efficient reallocation of resources; the transition speed is half that of the conventional neoclassical model. Furthermore, in the model economy, investment rates and total factor productivity are initially low and increase over time. We present data from the so-called miracle economies on the evolution of macro aggregates, factor reallocation, and establishment size distribution that support the aggregate and micro-level implications of our theory.

The Macroeconomics of Microfinance

This paper provides a quantitative evaluation of the aggregate and distributional impacts of economy-wide microfinance or other credit programs targeted toward small-scale entrepreneurs. In our analysis, we find that the redistributive impacts of microfinance are stronger in general-equilibrium, but the aggregate impacts are smaller. Making the typical microfinance program more widely available has a negligible impact on per-capita income, since an increase in aggregate total factor productivity(TFP) is offset by lower capital accumulation that stems from redistributing income from individuals with high saving rates to those with low saving rates. However, the welfare impact is uniformly positive except for those few that are extremely talented and/or wealthy.

Estimation of Dynamic Models with Nonparametric Simulated Maximum Likelihood

We propose an easy-to-implement simulated maximum likelihood estimator for dynamic models where no closed-form representation of the likelihood function is available. Our method can handle any simulable model without latent dynamics. Using simulated observations, we nonparametrically estimate the unknown density by kernel methods, and then construct a likelihood function that can be maximized. We prove that this nonparametric simulated maximum likelihood (NPSML) estimator is consistent and asymptotically efficient. The higher-order impact of simulations and kernel smoothing on the resulting estimator is also analyzed; in particular, it is shown that the NPSML does not suffer from the usual curse of dimensionality associated with kernel estimators. A simulation study shows good performance of the method when employed in the estimation of jump–diffusion models.

Is Transparency Good For You, and Can the IMF Help?

This paper finds that reforms introduced by the IMF to promote transparency have created more informed markets and reduced borrowing costs for those emerging market countries that volunteered for them. Using a quarterly panel estimation with fixed country effects, we find that sovereign spreads fall following the adoption of three different transparency reforms. The effects are economically important, especially for those countries with low initial transparency. We use two-stage least squares to address any endogeneity in the timing of reforms exploiting internal IMF timetables that are unrelated to country events. Next, using a panel GARCH specification, we show that spreads move more than normal in the days immediately following publication of IMF country documents.

Lifetime Labor Supply and Human Capital Investment

We develop a model of retirement and human capital investment to study the effects of tax and retirement policies. Workers choose the supply of raw labor (career length) and also the human capital embodied in their labor. Our model explains a significant fraction of the US-Europe difference in schooling and retirement. The model predicts that reforms of the European retirement policies modeled after the US can deliver 15-35 percent gains in per-worker output in the long run. Increased human capital investment in and out of school accounts for most of the gains, with relatively small changes in career length. JEL classification: E24; J24

Industrial and Occupational Employment Changes During the Great Recession

The U.S. labor market contracted sharply during the Great Recession. The ensuing recovery has been sluggish and by some measures still incomplete. In this paper, we break down aggregate employment during the Recession and the recovery into changes across industries and occupations. There is a clear asymmetric pattern: The contraction is driven by sectors and the recovery by occupations. In particular, the contraction between 2008 and 2010 primarily reflects a steep decline in construction employment, partially mitigated by expansions in the food services, education, and health industries. The recovery first came from a gradual increase in low-skill occupation employment across all sectors but after 2012 from a pronounced increase in high-skill occupation employment across all sectors. This pattern of recovery is a continuation of the underlying trend of polarization across occupations, which commenced in the 1980s.

Misallocation and Manufacturing TFP in Korea, 1982-2007

The authors apply the analysis of Hsieh and Klenow (2009) to assess the degree of resource misallocation in the Republic of Korea manufacturing sector from 1982 to 2007. They find improvement in the aggregate allocative efficiency during the first decade and a strong reversal after 1992. This pattern reflects the dynamics of the within-industry distortion measures for most industries and is consistent with the evolving systematic relationship between the age/value added of establishments and their measured idiosyncratic distortions over the sample period. Their finding suggests that the observed dispersion in revenue productivity should not be dismissed as mere artifacts of misspecification or measurement errors.