Horváth, C.

price effect brand category promotion model marketing price promotions change variable product consumer characteristic parameter elasticity elasticitie frequency level journal research price elasticity distribution brand i price elasticities display result market price changes category c activity equation literature feature analysis price effects discount price promotion difference response index matrix log sales vector increase time t error science example influence measure series determinant share product category study product categories sampling attacker purchase cross-brand price promotion frequency section victim estimate future price index price change relationship cross-price depth approach victim brand multivariate regression model price dispersion observation cross-price effects category characteristics period advertising function