Simulations for Hedging Financial Contracts with Optimal Decisions

2002 ◽  
pp. 271-296
Author(s):  
H. Windcliff ◽  
P. A. Forsyth ◽  
K. R. Vetzal ◽  
W. J. Morland
Keyword(s):  
Financial Contracts ◽  
Optimal Decisions

A Dynamic Investment Model with Profit-Sharing in an Interest-Free Economy

1991 ◽  
Vol 8 (1) ◽  
pp. 109-127
Author(s):  
Zaidi Sattar
Keyword(s):  
Optimal Investment ◽  
Integrated Approach ◽  
Building Blocks ◽  
Profit Sharing ◽  
Comparative Statics ◽  
Investment Model ◽  
Financial Contracts ◽  
Endogenous Variables ◽  
Rate Of Profit ◽  
Component Models

The present paper is a contribution to the building blocks of an investmentmodel within the framework of an integrated macroeconomic model of anIslamic economy. Investment behavior in the model is guided by an Islamicethicalvalue system and profit-sharing financial contracts. The typical firm’sinvestment decision is believed to emerge from a dynamic inter-temporalmaximization exercise within an infinite time horizon. The method of Calculusof Variations is applied to arrive at the optimal investment and employmentcriteria for the firm. The result is then incorporated into a macroeconomicmodel to study the behavior of key endogenous variables like national incomeand the rate of profit-share. Comparative statics exercised within a generalequilibrium framework reveal the potency of monetary policy but the neutralityof fiscal policy with respect to output and employment.IntroductionThe past decade has witnessed a tremendous outpouring of interest aswell as effort in the formalization of economic models based on profit-sharingfinancial arrangements as an Islamic alternative to the conventional interestbasedeconomic system. Several macroeconomic models for interest-freeeconomies have been proposed (Anwar 1987; Habibi 1987; Metwally 1981& 1983). The rigor of an integrated approach to such macroeconomic modelhgdepends on the rigor of the component models, namely, the consumption,investment, monetary, and fiscal relationships. Economists have writtenextensively on different aspects of consumer behavior in Islamic societies.Kahf (1978) and Khan (1984), among others, have contributed to the conceptualand analytical formulation of the consumption function under ...

scholarly journals Research on Closed-Loop Supply Chain Decision-Making in Different Cooperation Modes with Government’s Reward-Penalty Mechanism

2021 ◽  
Vol 13 (11) ◽  
pp. 6425
Author(s):  
Quanxi Li ◽  
Haowei Zhang ◽  
Kailing Liu
Keyword(s):  
Supply Chain ◽  
Closed Loop ◽  
Stackelberg Game ◽  
Recycling Rate ◽  
Transfer Payment ◽  
Closed Loop Supply Chain ◽  
Asymmetry Of Information ◽  
Optimal Decisions ◽  
The Government ◽  
The Impact

In closed-loop supply chains (CLSC), manufacturers, retailers, and recyclers perform their duties. Due to the asymmetry of information among enterprises, it is difficult for them to maximize efficiency and profits. To maximize the efficiency and profit of the CLSC, this study establishes five cooperation models of CLSC under the government‘s reward–penalty mechanism. We make decisions on wholesale prices, retail prices, transfer payment prices, and recovery rates relying on the Stackelberg game method and compare the optimal decisions. This paper analyzes the impact of the government reward-penalty mechanism on optimal decisions and how members in CLSC choose partners. We find that the government’s reward-penalty mechanism can effectively increase the recycling rate of used products and the total profit of the closed-loop supply chain. According to the calculation results of the models, under the government’s reward-penalty mechanism, the cooperation can improve the CLSC’s used products recycling capacity and profitability. In a supply chain, the more members participate in the cooperation, the higher profit the CLSC obtain. However, the cooperation mode of all members may lead to monopoly, which is not approved by government and customers.

Research Ethics Committees’ Oversight of Biomedical Research in South Africa: A Thematic Analysis of Ethical Issues Raised During Ethics Review of Non-Expedited Protocols

2019 ◽  
Vol 14 (2) ◽  
pp. 107-116 ◽  
Author(s):  
Blessing Silaigwana ◽  
Douglas Wassenaar
Keyword(s):  
South Africa ◽  
Research Ethics ◽  
South African ◽  
Biomedical Research ◽  
Ethical Issues ◽  
Ethics Committees ◽  
Financial Contracts ◽  
Scientific Validity ◽  
Participant Selection ◽  
Education And Awareness

In South Africa, biomedical research cannot commence until it has been reviewed and approved by a local research ethics committee (REC). There remains a dearth of empirical data on the nature and frequency of ethical issues raised by such committees. This study sought to identify ethical concerns typically raised by two South African RECs. Meeting minutes for 180 protocols reviewed between 2009 and 2014 were coded and analyzed using a preexisting framework. Results showed that the most frequent queries involved informed consent, respect for participants, and scientific validity. Interestingly, administrative issues (non-ethical) such as missing researchers’ CVs and financial contracts emerged more frequently than ethical questions such as favorable risk/benefit ratio and fair participant selection. Although not generalizable to all RECs, our data provide insights into two South African RECs’ review concerns. More education and awareness of the actual ethical issues typically raised by such committees might help improve review outcomes and relationships between researchers and RECs.

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