NOT FOR PUBLICATION Online Appendix to “Can Higher Prices Stimulate Product Use? Evidence from a Field Experiment in Zambia”
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چکیده
We will consider household behavior in some number of periods indexed by t. In each period t, each household i must decide whether to purchase Clorin and, if so, whether to use it in their drinking water. In period t, each household i can decide to purchase Clorin for an exogenous, possibly household-specific offer price pit ∈ (0, R] , where R > 0 is the retail price of Clorin. If the household decides to buy Clorin, it may receive an exogenous discount, so that it will only have to pay the transaction price p̃it ∈ [0, pit]. We assume that households do not anticipate the possibility of a discount, or, equivalently, that they consider the probability of a discount after purchase to be negligible. We experimentally manipulate the prices faced by households in a particular period t′. For simplicity, we will assume that in all previous and subsequent periods, Clorin retails at R, and there are no discounts. That is, we assume that, in any period t 6= t′, pit = p̃it = R. In period t′, however, prices pit′ and p̃it′ are randomly assigned across households in a manner specified in section IIExperimental and Survey Designsection.2 of the paper. We will also assume for simplicity that the utility from using Clorin in a given period is independent of its use in previous or future periods.1 We will think of a period as approximately one month, about the time it takes to use up a bottle of Clorin in drinking water for a family of six. We assume that Clorin cannot be stored across periods. Chemically, Clorin is storable, but in practice the vast majority of households in our sample appear to have exhausted the Clorin we sold them within the six weeks of our followup period. This suggests that it is reasonable to focus on within-period use. Implicitly, we are
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