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Analysis of Sales Promotion Effects on Household Purchase Behavior

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126<br />

Similar results are found regarding the influence <str<strong>on</strong>g>of</str<strong>on</strong>g> price-cut combined<br />

promoti<strong>on</strong>s for all three data sets: feature combined price cuts are used more than display<br />

combined price cuts, price cuts supported by both display and feature have the biggest<br />

impact from the different promoti<strong>on</strong> types, and promoti<strong>on</strong>s for the favorite brand have the<br />

biggest impact <strong>on</strong> promoti<strong>on</strong> resp<strong>on</strong>se. Therefore, regarding the effect <str<strong>on</strong>g>of</str<strong>on</strong>g> the different types<br />

<str<strong>on</strong>g>of</str<strong>on</strong>g> sales promoti<strong>on</strong>s <strong>on</strong> promoti<strong>on</strong> resp<strong>on</strong>se, the results seem to validate the legitimacy <str<strong>on</strong>g>of</str<strong>on</strong>g><br />

the multiple-promoti<strong>on</strong> decompositi<strong>on</strong>. But there are some excepti<strong>on</strong>s. The parameter<br />

estimates for the different n<strong>on</strong>-price cut promoti<strong>on</strong> types (XD, XDF) do vary between the<br />

three groups <str<strong>on</strong>g>of</str<strong>on</strong>g> parameter estimates. For these promoti<strong>on</strong>s, the effects are estimated to be<br />

greater for the combined data and the decomposed multiple-promoti<strong>on</strong> data. But, the effect<br />

<str<strong>on</strong>g>of</str<strong>on</strong>g> such a promoti<strong>on</strong> is reduced due to the presence <str<strong>on</strong>g>of</str<strong>on</strong>g> other types <str<strong>on</strong>g>of</str<strong>on</strong>g> promoti<strong>on</strong>. It can<br />

therefore be c<strong>on</strong>cluded that the presence <str<strong>on</strong>g>of</str<strong>on</strong>g> other types <str<strong>on</strong>g>of</str<strong>on</strong>g> promoti<strong>on</strong>s is especially<br />

detrimental for n<strong>on</strong>-price cut sales promoti<strong>on</strong>s (although this <strong>on</strong>ly partly explains the<br />

differences found).<br />

Overall, enough evidence for c<strong>on</strong>sistency in findings is obtained, leading to the<br />

c<strong>on</strong>clusi<strong>on</strong> that the results are providing us with valid and reliable results regarding the<br />

drivers <str<strong>on</strong>g>of</str<strong>on</strong>g> promoti<strong>on</strong>s resp<strong>on</strong>se. In the subsequent sub-secti<strong>on</strong>s, the results using the<br />

combined data will be dealt with in more detail.<br />

7.5.2 Results Hypotheses Testing <strong>Household</strong> (<strong>Purchase</strong>) Characteristics<br />

Related to <str<strong>on</strong>g>Promoti<strong>on</strong></str<strong>on</strong>g> Resp<strong>on</strong>se<br />

The results <str<strong>on</strong>g>of</str<strong>on</strong>g> the binary logistic regressi<strong>on</strong> analysis can be found in Table A7.3. In the<br />

next sub-secti<strong>on</strong>s, each hypothesis from Secti<strong>on</strong> 3.2 and Secti<strong>on</strong> 3.3 will be tested. As<br />

menti<strong>on</strong>ed before, in each table we will zoom in <strong>on</strong> each specific variable that is<br />

hypothesized to be related with promoti<strong>on</strong> resp<strong>on</strong>se. Each sub-secti<strong>on</strong> deals with the<br />

outcomes <str<strong>on</strong>g>of</str<strong>on</strong>g> the relati<strong>on</strong>ship between promoti<strong>on</strong> resp<strong>on</strong>se and a specific driver <str<strong>on</strong>g>of</str<strong>on</strong>g> this<br />

promoti<strong>on</strong> resp<strong>on</strong>se. Each possible categorical (nominal) driver <str<strong>on</strong>g>of</str<strong>on</strong>g> promoti<strong>on</strong> resp<strong>on</strong>se is<br />

incorporated in the analysis as a deviati<strong>on</strong> variable. The resulting estimated logistic<br />

regressi<strong>on</strong> coefficients for these categorical variables tell us how much more or less

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