Poor countries are more volatile than rich countries, and we know this volatility impedes their growth. We also know … that commodity price volatility is a key source of those shocks. This paper explores commodity and manufactures prices over … the past three centuries to answer three questions: Has commodity price volatility increased over time? The answer is no …

on the role of transaction costs for financial price volatility. For stock prices above French francs (FF) 500, the … volatility metric, we calculate 47,213 hourly volatility measures for all CAC40 stocks in the price range from FF 400 to FF 600 … and measure the volatility impact of the transaction cost increase at FF 500. We find that the median hourly range …

supply shocks that explain most of the volatility in real commodity prices. Next we quantify their dynamic effects on a wide …

add significantly to the dynamics implied by learning and substantially enhance the volatility of commodity prices. In our … substantial volatility in commodity prices despite the fact the model is subject only to i.i.d shocks. The shifting SCE … terms of the Hotelling model, a shifting SCE and variable escape dynamics introduces greater volatility at low frequencies …