درخت حوزه‌های تخصصی

During the last decade, several studies have argued that sticky information model proposed by Mankiw and Reis (2002), in which firms update their information occasionally rather than instantaneously, explains some stylized facts about the inflation dynamics. Sticky information pricing model successfully captures the sluggish movement of aggregate prices in response to monetary policy shocks. Despite the importance of sticky information, no empirical studies have been done yet to estimate sticky information Philips Curve (SIPC) and its key parameter - the degree of information rigidity - in Iran. This paper is the first attempt to estimate the degree of information stickiness in Iran using the two stage empirical approach proposed by Khan and Zhu (2006). Having the correct structural parameter allows a better understanding of the dynamics of inflation. Results show that the average duration of information stickiness ranges from 3.2 to 4 quarters in Iran. In addition, the existence of threshold effects in SIPC is also tested in this paper. Based on the estimation of TAR model over 2002Q2- 2015Q1, firms update information faster when inflation is higher. This evidence suggests that firms are more aware of macroeconomic conditions when inflation is higher; that is, missing information during high inflation periods is costly. JEL Classifications: E31, E37, C53, D84

The present paper contributes to the theoretical analysis of the human capital investment and participation decision of heterogeneous workers in the search and matching framework . Its aim is to characterize the equilibrium and to identify the efficiency . Here , the paper studies search equilibrium and matching to consider the participation decision of heterogeneous workers who have different inherent ability levels . The productivity investment decision is endogenous and wages are determined by the Nash bargain among participants. JEL Classifications: J23, J24

With the growth of capital market, the shareholding structure of companies has become more complex. Direct ownership is easily recognizable through companies’ shareholders information, however with the formation of cross shareholding among companies, a kind of indirect and complex shareholding has emerged which is not observable. The primary owners (original owners) can take over other companies through intermediate owners. In this research a model is presented to identify and investigate the structure of indirect ownership. Identifying the hidden ownership relations together with determining the level of complexity of network and the degree of ownership concentration are among the capabilities of this model. To this end, the ownership network of Tehran Stock Exchange in June 2014 was analyzed. The results indicate that over 86 percent of all observed ownership relations have been formed by indirect ownership and at least with the presence of one intermediate owner. Moreover, 15.35 percent of the market’s total value (equals with 547 thousands billion Rials) was calculated twice and also studying the degree of concentration of ownership indicates that over 60 percent of the market’s total value belongs to only 10 percent of the shareholders. JEL Classifications: L16, G32

In this paper we construct a modeling for detection of banks which are experiencing serious problems. Sample and variable set of the study contains 30 banks of Iran during 2006-2014 and their financial ratios. Well known multivariate statistical technique (principal component analysis) was used to explore the basic financial characteristics of the banks, and discriminant Logit and Probit models were estimated based on these characteristics. Results suggest that the model can be used as an analytical decision support tool in both on-site and off-site bank monitoring system to detect the banks which are experiencing serious problems. JEL Classifications: C49, G21, G33

The purpose of this paper is to investigate the relationship between the inflation and inflation uncertainty in Iran. Using mixed models of self-exciting threshold autoregressive (SETAR) and generalized autoregressive conditional heteroskedasticity (GARCH), the inflation behaviors are examined for the period 1990M05-2013M10. This approach allows testing the hypotheses of Friedman-Ball, Pourgerami-Maskus, Cukierman-Meltzer, and Holland during different inflationary regimes. The results indicate that an increase in Iran’s inflation leads to higher inflation uncertainty, as predicted by Friedman-Ball Hypothesis, while the other three hypotheses are not confirmed. Positive unidirectional causality from inflation to uncertainty seems to be significant only in periods of relatively higher inflation, but not in periods of low inflation. The finding is important because it confirms the existence of regime-dependent effect of inflation on public’s expectations about future inflation; that, in trend, it reduces economic activity and misallocates resources. This is a new insight about asymmetric behaviour of inflation in Iran that has noteworthy implications for policy-makers, especially for price stabilizing and inflation targeting. JEL Classifications: C22, E31.

Financial instruments are one of the fundamental dimensions of financial markets that guarantee their efficiency and effectiveness of these markets. These instruments playe a main role in economy to direct money from saving sources to investment needs. These instruments provide possibility of financing companies from public and private sources and also are considered as investment instruments for cash savings in an economy that can provide a suitable return for investors. Today, various financial instruments have been developed that can meet different financial needs of corporations which can comply with investor tastes and preferences. Among these instruments, commercial paper is usually considered as a short-term financing instruments for working capital expenditures of companies. Banks and credit institutions are among the main entities which issue commercial papers for their liquidity needs. In spite of this, like other traditional financial instruments, commercial papers have been developed and structured in western markets and cannot be issued in Islamic markets due to Shariah (Islam) regulations and condition. But, Islamic contracts and regulations have the capability to develop this important financial instrument in an accepted framework of prescribed contracts in Islam jurisprudence (Fiqh). The present research with a comparative study, (Delphy method) explains the conceptual model of Islamic commercial papers for banks and credit institutions in the form of Murabaha Sukuk, in a way that these papers can be structured and issued in the Islamic markets by using opinions of the experts. Key words: Islamic finance, Commercial paper, Sukuk, Murabaha JEL Classification: G21, G23, G32

Drastic changes and turbulence in macro-economic factors have the greatest impact on banks target market attractiveness in Iran. It is assumed that conventional segmentation models at the corporate level are not efficient for banking system. This study aims to develop a new segmentation model at the industry level for banks of Iran. For this purpose, structures and variables at the industry level were identified and defined by reviewing the literature and with the help of bank experts in focus group sessions. Then, data of ISIC 3-digit factories with 50 and more employees were extracted from Iran Statistic Center and Tehran Stock Exchange databases during 2005-2013. We used Hierarchical Cluster analysis in each year and identified 4 study groups across 9 years. We found that identified groups are significantly different regarding industry size, deposit and loan market size, industry growth, deposit and loan market growth, profitability, investment risk, and transaction with other industries. Keywords: Macro-segmentation, Manufacturing Industries, Segmentation based on industries, Hierarchical Clustering, Banking. JEL Classification: E44, G21, L60, M31, C67, C82