Measuring chronic and transient components of poverty: a Bayesian approach

After the publication of Ravallion’s Econ J 98:1171–1182, 1988 seminal work on chronic and transient poverty, wide attention has been given to the components of poverty. We propose a Bayesian mixture model to measure poverty and divide it into chronic and the transient poverty using the Foster, Greer and Thorbecke (FGT) measure. These two types of poverty are illustrated using the Panel Study of Income Dynamics (PSID) data.      

Introductory Essay for a Symposium on “Urban Interventionism”

The Review of Austrian Economics -     

Slow price reactions to analysts’ recommendation revisions

This study explores the reasons for the slow price reactions to analysts’ recommendation revisions. We predict that analysts’ recommendation revisions contain earnings-related information that is not incorporated in analysts’ earnings forecasts and that the slow price reaction is attributable to a gradual incorporation of this earnings-related information into stock prices. We find that, consistent with our prediction, stocks with recommendation upgrades subsequently experience more upward earnings forecast revisions than stocks with recommendation downgrades, and that the differences in subsequent stock returns between upgraded and downgraded stocks is attributable to differences between subsequent earnings forecast (especially, FY2 earnings forecast) revisions.     

Weakly non-separable preferences and the Harberger-Laursen-Metzler effect

We examine the current account effect of a terms-of-trade deterioration for a small country model, incorporating weakly non-separable preferences à la Shi (1994) under endogenous time preference. This enables us to emphasize a welfare change as an important determinant of the current account. Even with increasing marginal impatience, the Harberger-Laursen-Metzler effect occurs if consumers' preference toward imports is sufficiently wealth enhanced: in that case a terms-of-trade deterioration must reduce steady-state welfare to shift preference away from imports to exports. Several empirical implications are also derived. JEL Classification: F41; F32
Préférences faiblement nonséparables et l'effet de Harberger-Laursen-Metzler. L'auteur examine l'effet sur le compte courant d'une détérioration des termes d'échange dans un modèle d'un petit pays, quand les préférences sont faiblement nonséparables à la Shi (1994) et que la préférence temporelle est endogène. Cela permet de souligner qu'un changement dans le niveau de bien-être est un déterminant important du compte courant. Contrairement à ce qu'on trouve dans la littérature spécialisée, même quand on postule une impatience marginale croissante, l'effet Harberger-Laursen-Metzler se produit si la préférence des consommateurs pour les importations est suffisamment dépendante du niveau de richesse: dans ce cas-là, une détérioration des termes d'échange doit réduire le niveau de bien-être en régime permanent de manière à déplacer les préférences des importations vers les exportations. On déduit certaines implications empiriques de ces résultats.     

Regime uncertainty and optimal investment timing

We construct a real options model in which a regime change is expected at a pre-determined future time and study the effects of regime uncertainty on a firm's strategic investment decision, taking into consideration the remaining time to the regime change and the probability of each regime state. We show that just before the time of a regime change, firms should act as if the worst-case scenario was about to happen, even if a good state is highly possible.