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91.
We provide a competitive equilibrium theory of urban segregation in a linear city. Households demand consumption and housing along the city and are exposed to neighborhood externalities. We show that equilibria that are robust to small coalitional deviations are segregated. Our results explain urban segregation in a standard neoclassical framework and shed new light on the difficulties faced by authorities to integrate cities. 相似文献
92.
This paper compares the degree of openness to trade of three developed countries markets—the European Union, Japan, the United States—with that of three middle-income countries, namely Brazil, India, and China. A theoretically consistent protection measure—the Mercantilistic Trade Restrictiveness Index (MTRI)—is employed to average tariffs at different levels of aggregation. The computation relies on a comparative static applied general equilibrium model (Global Trade Analysis Project—GTAP) featuring imperfect competition as well as on the bilateral applied tariffs included in the most recent version of the GTAP database. Results provide a different picture from what could have been expected given the widely publicized diffusion of preferential schemes supposedly favoring developing countries exports. JEL no. F17, C68, Q17 相似文献
93.
Luca Riccetti 《Empirical Economics》2013,44(3):1315-1336
Many authors have suggested that the mean-variance criterion, conceived by Markowitz (The Journal of Finance 7(1):77–91, 1952), is not optimal for asset allocation, because the investor expected utility function is better proxied by a function that uses higher moments and because returns are distributed in a non-Normal way, being asymmetric and/or leptokurtic, so the mean-variance criterion cannot correctly proxy the expected utility with non-Normal returns. In Riccetti (The use of copulas in asset allocation: when and how a copula model can be useful? LAP Lambert, Saarbrücken 2010), a copula–GARCH model is applied and it is found that copulas are not useful for choosing among stock indices, but can be useful in a macro asset allocation model, that is, for choosing stock and bond composition of portfolios. In this paper I apply that copula–GARCH model for the macro asset allocation of portfolios containing a commodity component. I find that the copula model appears to be useful and better than the mean-variance one for the macro asset allocation also in presence of a commodity index, even if it is not better than GARCH models on independent univariate series, probably because of the low correlation of the commodity index returns to the stock, the bond and the exchange rate returns. 相似文献
94.
This study looks at the characteristics and determinants of booms and busts in housing prices for a sample of eighteen industrialised countries over the period 1980–2007. From an historical perspective, we find that recent housing booms have been amongst the longest in the past four decades. Estimates of a Multinomial Probit model suggest that domestic credit and interest rates have a significant influence on the probability of booms and busts occurring. Moreover, international liquidity plays a significant role for the occurrence of housing booms and—in conjunction with banking crises—for busts. We also find that the deregulation of financial markets has strongly magnified the impact of the domestic financial sector on the occurrence of booms. 相似文献
95.
Regis Barnichon 《Journal of Economic Dynamics and Control》2012,36(3):315-330
What is the relative importance of hiring and separation in driving unemployment fluctuations? This paper presents a framework to decompose the moments of unemployment and study the respective contributions of vacancy posting, a measure of firms’ hiring efforts, and separation. Separation accounts for about 40% of unemployment's variance, compared to 60% for vacancy posting, and contributes to about 60% of unemployment steepness asymmetry, the fact that unemployment increases faster than it decreases. Further, while vacancy posting is, on average, the most important contributor of unemployment fluctuations, the opposite is true around business cycle turning points, when separation is responsible for most of unemployment movements. 相似文献
96.
We consider the credit risk model of Collin-Dufresne and Goldstein (2001). According to this model, the price of a defaultable bond can be efficiently computed using a variational formulation that consists of an integral relation and a Volterra integral equation. In Collin-Dufresne and Goldstein (2001) this integral equation is justified by a probabilistic intuition, but is not proven formally. In this paper we analytically derive the variational formulation used in Collin-Dufresne and Goldstein (2001). This analysis allows to give a correct characterization of the solution of the integral equation. Furthermore the approach proposed in this paper could also be employed for other models of credit risk. 相似文献
97.
Recognizing the inflexibility inherent in standard capital budgeting analysis, recent research has provided new insights using a real options framework. This paper uses the explicit finite difference approach to value real options. However, instead of assuming a constant return and volatility term, we assume that these variables are sensitive to changes in the economic environment. Accordingly, we adapt our approach to incorporate a Markov switching feature. Further, we recognize that some of the modeling assumptions can be violated in a practical application. Therefore, we recommend using range based estimates of the real option value, as opposed to a point estimate. 相似文献
98.
Luca Paolo Merlino 《Labour economics》2012,19(4):557-567
I study the interaction between discrimination and investment using a directed search model where firms decide the capital intensity of their production technologies before being matched. Discrimination makes some workers cheap to hire. As a consequence, some firms might save on capital costs adopting labour intensive technologies. This framework allows one to reconcile search models with three well-known facts regarding the labour market outcomes of minority workers: low wages, high unemployment and occupational segregation. Furthermore, the model questions the role of equal pay legislation in reducing inequality since removing this restriction, i.e., allowing firms to post type-contingent wages, eliminates the negative effects of discrimination on investment and wages. 相似文献
99.
In this paper, we investigate gender differences in workers’ career development within and outside the firm to explain the existence of gender wage gaps. Using Danish employer–employee matched data, we find that good female workers are more likely to move to better firms than men but are less likely to be promoted. Furthermore, these differences in career advancement widen after the first child is born. Our findings suggest that career impediments in certain firms cause the most productive female workers to seek better jobs in firms in which there is less gender bias. 相似文献
100.
Luca Lambertini 《Journal of urban economics》1997,41(3):407-420
We investigate a horizontally differentiated duopoly in which a public authority can either tax or subsidize firms, in order to induce duopolists to choose the socially optimal locations. The policy proposed here is such that welfare maximization is achieved by directly affecting firms' location without explicitly modifying their price behavior. 相似文献