The present invention provides methods for reducing induction periods in epoxide-CO
2
copolymerizations. In certain embodiments, the methods include the step of contacting an epoxide with CO
2
in the presence of two catalysts: an epoxide hydrolysis catalyst and an epoxide CO
2
copolymerization catalyst. In another aspect, the invention provides catalyst compositions comprising a mixture of an epoxide hydrolysis catalyst and an epoxide CO
2
copolymerization catalyst.