Now that pollution is reaching worrisome levels in some countries and at the global level, there is a growing consensus that it needs to be explicitly considered as a by-product of the production process and incorporated in economic decisions. But this is not easy in the absence of markets and...

Multifactor productivity (MFP) is increasingly used in economic policy, not least to compute potential output. Most measures are based on a standard production function combining labour and capital, but do not incorporate the negative by-products of the production process such as air pollution...