Oskam, A.J.

butter price second-grade butter consumption demand second-grade equation policy netherland country revenue budget demand equation period butter consumption instrument demand equations milk powder west germany quantity value market variable germany level figure ec countries difference price difference section export marketing powder observation table butter price price elasticity function supply result non-domestic non-domestic consumption margarine elasticity consumer number change assumption trend wierenga denmark demand functions coefficient instrument values effect intervention price arrangement regression procedure estimation increase marketing policy quarter table 3 oskam production non-domestic butter consumption influence household demand function budget costs exogenous variables sa butter revenue policy element curve product decrease point column