panel econometric generic structure. The issues covered range from the estimation of double-indexed versus higher …One of the oldest and largest literatures in empirical economics is concerned with the estimation of demand and supply … across pairs or regional units or even across cross-sectional units and time inevitably leads to a panel data structure of …

chemical industry. We use a rich panel data-set of 12,552 firms observed over the period 2004 - 2006 and model output by the …, that our estimation procedure performs well in small samples. We find evidence of positive spillovers across chemical …