Analysis of Sales Call Effectiveness
测量了一家比利时制药公司对成熟处方药的销售拜访效果，发现销售拜访弹性随所用辅助材料的不同而系统变化。
The sales response of an established ethical drug to sales calls by one Belgian pharmaceutical manufacturer is measured. A key feature is the systematic variation in the sales call elasticity over time as a function of the collateral material used.