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排序方式: 共有115条查询结果,搜索用时 15 毫秒
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.
Several studies have reported a 'V'-shaped relationship between short-term temperature and mortality rates, characterized by mortality rates that are higher when the temperature is extremely low or high than when the temperature is moderate. To quantify the effect of adaptation to a certain climate on this V-shaped short-term temperature-mortality relationship, we studied the prefecture-specific relationship between daily maximum temperature and mortality rates for 65+-years-old Japanese from 1972 to 1990. For both genders, the optimum daily maximum temperature (OT) category at which the mortality rate was minimum ranged from 23C-28 C to 33+C, and the OT level became lower when the climate became colder. The mean OT level was lower for women than for men by 1.7C. The mortality rate at the OT was almost constant across prefectures, regardless of the climate. From the results, we considered that the adaptation effect on the short-term temperature-mortality relationship is mainly described by the 'horizontal shift model': the V-shape moves horizontally according to the climate. This 'shift' should be taken into account in estimating the health effect of global warming, and the model would be useful for the estimation. 相似文献
3.
The Effects of Liquidity Shocks on Corporate Investments and Cash Holdings: Evidence from Actuarial Pension Gains/Losses 下载免费PDF全文
Takafumi Sasaki 《Financial Management》2015,44(3):685-707
This paper investigates how anticipated liquidity shocks affect corporate investment and cash holdings by examining the impacts of actuarial pension gains/losses that do not reduce current internal resources but will reduce those available in the future. Using a sample from Japanese manufacturing firms in which pension deficits had a huge impact on the internal resources of sponsoring firms, I show that pension losses significantly decrease the capital expenditures of sponsoring firms. Pension losses also increase corporate cash holdings, suggesting precautionary demands for cash prepared for future pension contributions. Overall, the results indicate that managers consider anticipated liquidity shocks in determining current investment and cash‐saving policies. 相似文献
4.
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
5.
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
6.
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
7.
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
8.
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
9.
M. Tariq Yousuf Khan & Komei Sasaki 《Review of urban and regional development studies : RURDS : journal of the Applied Regional Conference》2001,13(2):143-162
This study analyzes the role of public capital in Pakistan's economy, tracing the relationship between productivity of public capital and economic growth. We estimate a production function, with public capital as an inputs. The results indicate that the productivity (output elasticity) of aggregate as well as different components of public capital are sufficiently high. We also analyze substitutability and complementarity between public and private capital by estimating investment functions, revealing that public capital has worked as a substitute for private investment. The net effect of public capital on the national economy is analyzed by estimating reduced forms, with the result that public capital has a positive net effect on national product. The growth analysis shows that the contribution of public capital is declining over time. 相似文献
10.
Consider an oligopolistic industry where production is time-consuming, so that each firm needs to make quantity commitment by producing before the market opens. If demand uncertainty resolves some time before the market arrives, then those firms who produce early behave as simultaneous leaders (co-leaders), whilst those who wait until demand becomes observable will be followers. We discover that, in an n -firm oligopoly, the equilibrium number of co-leaders tends to be in excess of their socially optimal number, albeit both numbers monotonically decrease in the magnitude of demand uncertainty relative to the expected level of demand. We also find that, with demand uncertainty and the possibility of Stackelberg behaviour, whether the excess entry theorem applies depends upon the number of existing followers. 相似文献