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1.
Expected exponential utility maximization of insurers with a Linear Gaussian stochastic factor model
In this paper, we consider the problem of optimal investment by an insurer. The wealth of the insurer is described by a Cramér–Lundberg process. The insurer invests in a market consisting of a bank account and m risky assets. The mean returns and volatilities of the risky assets depend linearly on economic factors that are formulated as the solutions of linear stochastic differential equations. Moreover, the insurer preferences are exponential. With this setting, a Hamilton–Jacobi–Bellman equation that is derived via a dynamic programming approach has an explicit solution found by solving the matrix Riccati equation. Hence, the optimal strategy can be constructed explicitly. Finally, we present some numerical results related to the value function and the ruin probability using the optimal strategy. 相似文献
2.
This article investigates the relationship between the Herfindahl–Hirschman Index (HHI) and welfare in multiple‐leader Stackelberg models. We formulate two long‐run models of free entry of followers; in the first (second) model, leaders select their output before (after) the entry of the followers. We find that in both models, in contrast to the short‐run models, the Stackelberg model yields a larger welfare and HHI than the Cournot model does regardless of the number of leaders; that is, beneficial concentration always occurs. 相似文献
3.
By using a Kaleckian model with debt accumulation, Hein (2007; Metroeconomica, 56 (2), pp. 310–39) found that the long‐run equilibrium value of the debt–capital ratio is positive and stable only if interest rates are extremely high and if the short‐run equilibrium exhibits the ‘debt‐led’ growth regime. However, this conclusion crucially depends on the assumption that the retention ratio of firms is equal to unity. By relaxing this assumption, we show that there exists a positive and stable long‐run equilibrium even under the ‘debt‐burdened’ regime without any constraint on the nominal interest rate. 相似文献
4.
Wahyu Yuwana Hidayat Makoto Kakinaka Hiroaki Miyamoto 《Journal of Asian Economics》2012,23(4):335-343
The recent trend of product diversification in the Indonesian banking industry underscores the importance of non-interest income activities. This study examines the relationship between product diversification and bank risk over the period of 2002–2008. Our analysis shows clear evidence that the effect of product diversification on bank risk depends highly on the bank's asset size. Specifically, the degree of product diversification is negatively associated with bank risk for small-sized banks. Conversely, the degree of product diversification is positively related to bank risk for large-sized banks. This finding suggests that deregulation encouraging banks to become more involved in non-traditional activities may have an adverse effect on the overall banking system where large-sized banks are playing a significant role in Indonesia. 相似文献
5.
This paper constructs an open economy Kaleckian model in which international competition affects the bargaining process between firms and workers, and investigates the effects of such bargaining on the macroeconomy. We show that the effects of a change in the bargaining power on aggregate demand depends not only on the demand regimes but also on which agents bears more of the burden arising from the international price competition. Moreover, if the real exchange rate has a small impact on the trade balance, the economy is stable, whereas if it has a larger impact on the trade balance, the economy is unstable. 相似文献
6.
Hiroaki Sasaki 《Journal of Economics》2013,108(2):145-171
This paper presents a disequilibrium macrodynamic model that incorporates certain elements from Goodwin (the dynamics of the rate of employment and income distribution), Kalecki (an investment function independent of savings, and mark-up pricing in oligopolistic goods markets), and Marx (the reserve-army and reserve-army-creation effects). The model has a system of differential equations for the rate of utilization, profit share, and rate of employment. We show that there exist limit cycles that depend on the sizes of the reserve-army effect and reserve-army-creation effect. This implies that there exists a situation in which the economy experiences endogenous and perpetual growth cycles. Moreover, we show that if the stable long-run equilibrium corresponds to the profit-led growth regime, an increase in the bargaining power of workers increases the rate of unemployment; conversely, if the equilibrium corresponds to the wage-led growth-regime, an increase in the bargaining power of workers decreases the rate of unemployment. 相似文献
7.
This article examined the empirical relationship between prices paid for national 3G wireless licenses when spectrums were sold by auction. The reduced-form modelling approach was based on the premise that auction design features can, and do, affect both final (revenue) and intermediate (viz., auction competitiveness and license assignment) auction outcomes. Importantly, the analysis recognizes, and explicitly allows for, the endogeneity of bidder entry and sample selection arising from an absence of bidding. Generally, these key features have only received attention in isolation. In particular, the study addressed the principal question of: which regulator chosen auction design variables determine prices paid in spectrum auctions? The analysis showed that flexible-package formats increased prices paid, and that higher reserve prices had a dampening effect. The article also showed that longer license terms and more competitive auctions (as measured by the bidders-to-licenses ratio) enhance prices paid. 相似文献
8.
In this collection of concisely argued essays, Robert C. Allenreexamines several important questions familiar to anyone interestedin Soviet history: the hypothetical development of Russia inthe absence of the 1917 Bolshevik Revolution; the standing ofRussias and the Soviet Unions economic and demographicdevelopment in relation to other countries; the controversysurrounding the strategy for economic development after therevolution; the reasons for Stalins rapid industrializationand the role of the agricultural sector in it; and 相似文献
9.
Hiroaki?HataEmail authorView authors OrcID profile Jun?Sekine 《Asia-Pacific Financial Markets》2017,24(3):221-252
Risk-sensitive asset management problems, both those with a finite horizon and those with an infinite horizon, are studied in a financial market model that has a Wishart autoregressive-type jump-diffusion factor, which is a positive-definite symmetric matrix-valued process. The model describes the stochasticity of the market covariance structure, the interest rates, and the risk-premium of the risky assets. We obtain explicit representations of the solutions to the problems. 相似文献
10.
Hiroaki Sasaki 《International Review of Applied Economics》2008,22(1):77-91
The purpose of this article is to evaluate empirically the classical viability condition for East Asia, Latin America, Sub‐Saharan Africa 1980–1995, and advanced countries 1950–1992. The viability condition is proposed by Foley and Michl (1999), and is used for judging empirically which approach is more valid, the classical biased technical change approach or neoclassical production function approach. Our results acknowledge the predominance of the former, which is Foley‐Michl’s contention. However, there remains a disputable interpretation as to the case of a declining labour productivity, which is broadly seen in Latin America and Sub‐Saharan Africa during the period considered. 相似文献