2,664 research outputs found

    Rate of Decay of Stable Periodic Solutions of Duffing Equations

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    In this paper, we consider the second-order equations of Duffing type. Bounds for the derivative of the restoring force are given that ensure the existence and uniqueness of a periodic solution. Furthermore, the stability of the unique periodic solution is analyzed; the sharp rate of exponential decay is determined for a solution that is near to the unique periodic solution.Comment: Key words: Periodic solution; Stability; Rate of deca

    Bank Discrimination in Transition Economies: Ideology, Information or Incentives?

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    We study bank discrimination against private firms in transition countries. Theoretically, we show that banks may discriminate for non-profit reasons, but this discrimination diminishes with a bank’s incentives and human capital. Employing matching bank-firm data from China, we empirically examine the extent, sources and consequences of discrimination. Our unique survey design allows us to disentangle sample truncation, omitted variable bias, and endogeneity issues. Our empirical findings confirm the theoretical predictions. We also find that as a result of discrimination, private firms resort to more expensive trade credits.http://deepblue.lib.umich.edu/bitstream/2027.42/39902/3/wp517.pd

    Stability and exact multiplicity of periodic solutions of Duffing equations with cubic nonlinearities

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    We study the stability and exact multiplicity of periodic solutions of the Duffing equation with cubic nonlinearities. We obtain sharp bounds for h such that the equation has exactly three ordered T-periodic solutions. Moreover, when h is within these bounds, one of the three solutions is negative, while the other two are positive. The middle solution is asymptotically stable, and the remaining two are unstable.Comment: Keywords: Duffing equation; Periodic solution; Stabilit

    Existence, uniqueness, and stability of periodic solutions of an equation of Duffing type

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    We consider a second-order equation of Duffing type. Bounds for the derivative of the restoring force are given which ensure the existence and uniqueness of a periodic solution. Furthermore, the unique periodic solution is asymptotically stable with sharp rate of exponential decay. In particular, for a restoring term independent of the variable tt, a necessary and sufficient condition is obtained which guarantees the existence and uniqueness of a periodic solution that is stable.Comment: Key words and phrases: Periodic solution, topological degree, stabilit

    Mother's Education and Child Health: Is There a Nurturing Effect?

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    In this paper, we examine the effect of maternal education on the health of young children by using a large sample of adopted children from China. As adopted children are genetically unrelated to the nurturing parents, the educational effect on them is most likely to be the nurturing effect. We find that the mother's education is an important determinant of the health of adopted children even after we control for income, the number of siblings, health environments, and other socioeconomic variables. Moreover, the effect of the mother's education on the adoptee sample is similar to that on the own birth sample, which suggests that the main effect of the mother's education on child health is in post-natal nurturing. Our work provides new evidence to the general literature that examines the determinants of health and that examines the intergenerational immobility of socioeconomic status.


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    This paper studies insider privatization in transition economies. We show theoretically that the underperformance of insider-privatized firms could be due to the manager-cum-owner's lack of incentives after privatization. A screening theory predicts that a firm's postprivatization incentives increase with the firm's buyout price. The empirical results show that the buyout price decreases with the degree of information asymmetry and that a firm's postprivatization performance increases with the buyout price. We also find that the performance of premium-paying firms converges with that of private firms after privatization; in contrast, heavily discounted firms perform indistinguishably from government-owned firms.Political Economy,