Azomahou, Théophile Laisney, François van Phu, Nguyen
Year of Publication:
ZEW Discussion Papers 05-56
We examine the empirical relation between CO2 emissions per capita and GDP per capita during the period 1960-1996, using a panel of 100 countries. Relying on the nonparametric poolability test of Baltagi et al. (1996), we find evidence of structural stability of the relationship. We then specify a nonparametric panel data model with country-specific effects. Estimation results show that this relationship is upward sloping. Nonparametric specification tests do not reject monotonicity but do reject the polynomial functional form which leads to the environmental Kuznets curve in several studies.
Environmental Kuznets curve panel data poolability test mono- tonicity test specification test