panel data method

An empirical analysis is carried out establishing the existent relationship among the stock market (Beta) and (a) macroeconomic and (b) accounting informations. Regression analysis, using static and dynamic panel data estimations, is applied to a sample of 61 listed Iranian firms, between 2001and 2010. Systematic risk is estimated through OLS, EGARCH and M-GARCH models and use TEDPIX index (Tehran Stock Exchange Dividend & Price "total return" Index) as market portfolio.
The results show a connection between the systematic risk and the independent variables. The best models are found when we estimate the systematic risk using EGARCH model and applying a combination of macroeconomic and accounting variables. The most important variables explaining the systematic risk are Size (SZ), Growth Rate (GR) and Debt Ratio (DR) from accounting variables and Gross Domestic Product (GDPI),inflation (Change in CPI index), Legal interest rate (LINT), Oil price (Oilprice) and Exchange rate (EXCR). The results vary using different models and might be different if we use a different sample.

This paper evaluates the effects of financial liberalization on Market Capitalization Ratio, from 1990 to 2008, for a sample of 6 countries. These countries are of the MENA region: Egypt, Oman, Saudi Arabia,, Iran Islamic Rep, Jordan, Tunisia. We used the Foreign Direct Investment as financial liberalization index. The finding shows that financial liberalization spurs Market Capitalization Ratio. Unfortunately this effect is low. Some of reasons are economic instability, visit constraint for foreign investment and securities expansion to them. Economic stability and substructure provisions and precaution for securities expansion to foreign investment are precondition to liberalization.