in this paper, the researchers present a multi-objective linear fractional inventory model using fuzzy pro-gramming. the proposed method in this paper is applied to a problem with two objective functions. the re-sulted fuzzy model is transformed into an ordinary linear programming. the implementation of the develop-ing model presented in this paper is demonstrated through the use of some numeri...

The size distributions of many economic variables seem to obey the double power law, that is, the power law holds in both the upper and the lower tails. I explain this emergence of the double power law—which has important economic, econometric, and social implications—using a tractable dynamic stochastic general equilibrium model with heterogeneous agents subject to aggregate and idiosyncratic ...

Shortfall aversion reflects the higher utility loss of a spending cut from a reference point than the utility gain from a similar spending increase, in the spirit of Prospect Theory’s loss aversion. This paper posits a model of utility of spending scaled by a function of past peak spending, called target spending. The discontinuity of the marginal utility at the target spending corresponds to s...

research interests have been focused on the concept of penalizing jobs both for being early and for being tardy because not only of modern competitive industrial challenges of providing a variety of products at a very low cost by smoothing productions but also of its increasing and exciting computer applications. here, sequencing approaches of the mixed- model just-in-time production systems is...

there are various views about deceision making for the model of growing crops in risky conditions such as: motad model, inome - variance, grade2 planning, inseparable linear planning, and limited extreme risk model, focus-loss model, and target- motad . in this study, target - motad model has been used as the optimum pattern of growing crops in arsanjan. the results have been compared with thos...

We estimate a model with countryand industry-specific shocks that extends the dummy variable model used in the portfolio diversification literature by relaxing the restriction that all stocks with exposure to a given shock have the same exposure to that shock. We find that: i) This restriction is strongly rejected by the data. ii) Many industry betas are negative, while almost all country betas...

The study empirically investigates the relationship between the value anomaly and firms’ investment and financing environment. The evidence supports the relevance of investment irreversibility and the value anomaly as suggested in Zhang (2005). The higher the investment irreversibility gap between value and growth firms, the higher the value premium. While the Fama and French three factor model...

We propose an equilibrium model to study the impact of short-sale constraints on market prices and liquidity in imperfectly competitive markets where market makers have significant market power and are averse to inventory risk. We show that shortsale constraints decrease bid because of the market power and increase ask because of the risk aversion. Our model can therefore help explain why short...