cointegration Classical regression analysis assumes that the error term in a regression is normally and independently distributed. An extreme violation of this condition is when the error term is a random walk. Such a regression is termed a spurious regression and the results are not reliable. It usually indicates that a required variable with random walk behavior has been omitted from the mode...

1. Introduction The environmental Kuznets curve is a hypothesized relationship between various indicators of environmental degradation and income per capita. In the early stages of economic growth degradation and pollution increase, but beyond some level of income per capita (which will vary for different indicators) the trend reverses, so that at high-income levels economic growth leads to env...

T he environmental Kuznets curve posits an inverted-U relationship between pollution and economic development. Kuznets’s name was apparently attached to the curve by Grossman and Krueger (1993), who noted its resemblance to Kuznets’s inverted-U relationship between income inequality and development. In the first stage of industrialization, pollution in the environmental Kuznets curve world grow...

this study attempts to investigate the relationship between pollution and economic growth for two groups of countries according to environmental kuznets curve hypothesis for a sample of 24 developing countries and 26 oecd countries over the period 1980 - 2005. then, we examine this hypothesis using modern econometrics techniques including panel co-integration and panel unit-root. the panel data...

in this paper, we have calculated the environmental efficiency for india, turkey, egypt and iran. the results show that iran’s environmental efficiency has experienced a decreasing trend from 1991 to 2007and india, turkey, egypt and iran have the highest environmental efficiency, respectively. we also have investigated the environmental kuznets curve for this period using data envelopment analy...