On the instability of competitive equilibrium: a further example

It is shown that a Walrasian price adjustment process fails to converge to an equilibrium in an exchange economy with three consumers and three commodities, where each consumer has a quasilinear utility function, desires only two commodities, and demands positive amounts of both commodities. The instability is due to weak substitution effects in addition to asymmetrical income effects.Exchange economy, Instability, Quasilinear utility

Labor Supply and the Demand for Child Care: An Intertemporal Approach

In this paper, we present a model of a one parent–one child household where parental decisions on labor supply, leisure, and the demand for private and public child care are simultaneously endogenized and intertemporally determined. We characterize the path of the optimal decisions and investigate the impact of various public child care fees and of the quality of public child care services on the parent’s time allocation and the child’s performance level. Our results show that different public child care policies may induce substantially diverging effects, and reveal that each policy frequently faces a trade off between an encouragement of labor supply and an enhancement of the child’s performance.child care fees and services, demand for child care, intertemporal optimization, labor supply, leisure, parental time allocation, private and public child care, public child care policy

Relativistic mean-field model with density-dependent meson-nucleon couplings

Within the relativistic mean-field approach, we extend the Miyazaki model, where the NN$\sigma$ and NN$\omega$ interactions are modified to suppress the couplings between positive- and negative-energy states of a nucleon in matter. Assuming appropriate density-dependence of the meson-nucleon couplings, we study nuclear matter and finite nuclei. The model can reproduce the observed properties of $^{16}$O and $^{40}$Ca well. We also examine if the model is natural.Comment: 6 pages, 3 figure

Does nativity matter?

The Russian Federation has experienced simultaneous declines in health and rises in international migration. Guided by the “healthy migrant effect†found elsewhere, we examine two questions. First, do the foreign-born in the Russian Federation exhibit better overall health than the native-born? Second, to the extent positive health selectivity exists, is it transferred to the second generation? Using the first wave of the Russian Generations and Gender Survey, our findings support the idea of positive health selection among international migrants from non-Slavic regions. The effect of migrant status, regardless of origin, diminishes when age, sex, and native language are taken into account.education, health, language, migration, Russian Federation, second generation, sex