Replication Data for: Are Left-Wing Party Strength and Corporatism Good for the Environment? A Panel Analysis of 21 OECD Countries, 1980-1998, Ecological Economics 45 (2), 2003, pp. 203-220

The effect of left-wing party strength and corporatism on air pollution levels in up to 21 OECD countries over the period 1980 or 1990/1999 is tested with both fixed-effects and random-effects estimators. Controlling for scale, composition, technique as well as aggregate time effects, robust evidence is found that parliamentary green/leftlibertarian party strength is associated with lower pollution levels. The rise of ecologically oriented parties has thus had a real impact on air pollution levels. Traditional left-wing party strength is possibly also associated with lower pollution levels, but the evidence is less consistent and robust. Combined left-wing party strength in government is possibly associated with higher pollution levels, but this result is also far from robust and is practically small. No evidence is found for a consistent systematic impact of corporatism on pollution levels.