The present study has made an attempt to discuss the effects of exchange rate volatility and price expectation on maize imports in Iran from 1980 to 2013. In doing so, using the EGARCH technique for time series econometrics, price volatility variables for both exchange rate and final price have been calculated, and the time series for these variables have been extracted. Additionally, in regard...

For portfolio optimisation under proportional transaction costs, we provide a duality theory for general càdlàg price processes. In this setting, we prove the existence of a dual optimiser as well as a shadow price process in a generalised sense. This shadow price is defined via a “sandwiched” process consisting of a predictable and an optional strong supermartingale and pertains to all strateg...

We revisit the discussion about the relationship between price’s cyclical features, implicit collusion and the demand level in an oligopoly supergame where a positive shock may hit demand and disrupt collusion. The novel feature of our model consists in characterising the post-shock noncooperative price and comparing it against the cartel price played in the last period of the collusive path, t...

Derivatives are alternative financial instruments which extend traders opportunities to achieve some financial goals. They are risk management instruments that are related to a data in the future, and also they react to uncertain prices. Study on pricing futures can provide useful tools to understand the stochastic behavior of prices to manage the risk of price volatility. Thus, this study eval...

We introduce product differentiation in the model of price competition with strictly convex costs in which firms have to supply all the forthcoming demand. We find that although a continuum of equilibria exists in a homogeneous product market, the competitive price equilibrium is the only robust one. Specifically, as long as the equilibrium correspondence is nonempty, the equilibrium price conv...

Should a central bank accommodate energy price shocks? Should the central bank use core inflation or headline inflation with the volatile energy component in its Taylor rule? To answer these questions, we build a dynamic stochastic general equilibrium model with energy use, durable goods, and nominal rigidities to study the effects of an energy price shock and its impact on the macroeconomy whe...

â â â  â  zahra zamani [1] â â  seyed komail tayebi â  department of economics, university of isfahan, iran â â department of economics, university of isfahan, iran â â â  abstract â  international trade causes that markets to become more competitive and small-medium sized enterprises (smes) learn to compete effectively within this increasingly competitive global market place. smes are able to ...

this paper estimates demand functions for wireless and wireline phone, using almost ideal demand system (aids) and attempts to test the hypothesis of substitutability between wireless and wireline in iran. the results indicate that the number of mobile subscribers has been growing more than the number of wireline subscribers over studied period. this maybe because of lower price of mobile acces...

Iran has suffered ever-increasing domestic energy consumption, mostly because of its long-standing price control policy. To decelerate this trend, Iran began a reform on its energy subsidy system in December 2010. This paper examines the inflationary impact of the energy subsidy reform on different Iranian non-energy sectors and urban and rural households by making an updated input–output...

Under complete information, for k 3, a seller of a single-unit k-price auction obtains higher revenue than in a first or second price auction when the valuations and the bids are discrete and no bidder is using a (weakly) dominated strategy.  2002 Elsevier Science (USA). All rights reserved. JEL classification: C72; D44