What is driving recent growth in OECD countries? Why is it that their levels of GDP per capita are no longer converging? Why is it that some countries, operating at the technological frontier, where advances are difficult, appear to be widening the gap? Whether or not it is appropriate to speak...

This Test Guideline is designed to assess the effects of prolonged exposure to chemicals on the growth of juvenile fish. Juvenile fish in exponential growth phase are placed, after being weighed, in test chambers and are normally exposed to five sublethal concentrations of the test substance...

This Test Guideline is designed to assess the toxicity of substances to freshwater aquatic plants of the genus Lemna (duckweed). Exponentially growing plant cultures of the genus Lemna (Lemna gibba and Lemna minor usually) are allowed to grow as monocultures in, at least, five concentrations of...