iqala (cancelling of the contract) is a legal act that is formed by sides' satisfactory contract and makes it breakup. imami, hanbali and shafei jurists revocate the iqala. hanafi jurists account iqala revocation into sides of contract, but a new transaction into outsiders. from the maleki jurists viewpoint, iqala is a new transaction, but civil code accounts the iqala tafasokh (breaking u...

assistive technologies have always opened new horizons in human’s life, posed solutions to problems and brought relief and prosperity for human beings. iranian judicial authorities have recently recognized the importance of medical technologies. accordingly, iranian legal system has recognized surrogacy and a surrogacy contract seems unavoidable for surrogacy to be legally valid, socially accep...

In this paper, an inventory model for deterioration items in a two-echelon supply chain including one retailer and one manufacturer is proposed by considering the stock and price dependent demand and capacity constraint for holding inventories. First, the model is presented as a leader-follower game in which the manufacturer announces wholesale prices. Second, the retailer decides for the order...

The Black–Scholes* option pricing model is commonly applied to value a wide range of option contracts. However, the model often inconsistently prices deep in-the-money and deep out-of-the-money options. Options professionals refer to this well-known phenomenon as a volatility ‘skew’ or ‘smile’. In this paper, we examine an extension of the Black–Scholes model developed by Corrado and Su‡ that s...

This paper examines the hedging effectiveness of gold futures for the stock market in minimizing variance and downside risks, including value at risk and expected shortfall using data from the Iran emerging capital market during four different sub-periods from December 2008 to August 2018. We employ dynamic conditional correlation models including VARMA-BGARCH (DCC, ADCC, BEKK, and ABEKK) and c...

Design by Contract is a powerful technique that provides the promise of specifying classes in a machine checkable way. Until recently, it has failed to live up to that promise. However, the organizers of this workshop have developed, and continue to develop a disciplined approach for using Design by Contract to completely specify classes, often in ways that can be completely checked automatical...

Using econometric models of endogenous sample selection, we examine possible payment bias to Medicare Tax Equity and Fiscal Responsibility Act of 1982 (TEFRA) risk health maintenance organizations (HMOs) in the Twin Cities in 1988. We do not find statistically significant evidence of favorable HMO selection. In fact, the sign of the selection term indicates adverse selection into HMOs. This fin...

Several papers have recently underlined the relationship between institutional quality and international trade. Institutions are in charge of the enforcement of contracts: good institutions are those which punish the part that breaks the contract, and implement this activity with a high probability of success. Goods can be more or less complex, according to the number of intermediate inputs nee...

the condition within the contract is a principle that has been recognized in the islamic law but there is disagreement among the authorities concerning its impact on the condition of the contract in the two stages of formation and continuation of the contract. in the formation stage, the difference is in terms of the relation between the condition and the subject, concerning which, from among t...