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Understanding Consumer Reactions to Assortment Unavailability

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Appendix 2A: Overview and definition of independentvVariables<br />

Main variables<br />

Brand equity (BE) Strength of brand in<br />

terms of price level,<br />

Concept Measurement Instrument<br />

awareness, and quality<br />

Hedonic level (HL) Hedonic level of<br />

product category<br />

Product-related variables<br />

Number of brands<br />

(NB)<br />

Number of national<br />

brands in category X<br />

with a market share ≥<br />

3%<br />

Brand loyalty (BL) Loyalty <strong>to</strong>ward brand<br />

Y in category X<br />

S<strong>to</strong>ckpiling (SP) The level of safety<br />

s<strong>to</strong>ck consumers<br />

usually have in their<br />

homes before they<br />

res<strong>to</strong>ck the product<br />

Impulse buying (IB) Distinction between<br />

unplanned and planned<br />

purchases<br />

Buying frequency Average buying<br />

(BF)<br />

frequency<br />

S<strong>to</strong>re-related variables<br />

S<strong>to</strong>re loyalty (SL) Loyalty <strong>to</strong>wards s<strong>to</strong>re<br />

Z when shopping for<br />

Availability of<br />

alternative s<strong>to</strong>res<br />

(AS)<br />

S<strong>to</strong>re type (ST)<br />

groceries<br />

Number of competing<br />

supermarkets in the<br />

same shopping area<br />

The number of items<br />

the supermarket offers<br />

<strong>to</strong> the consumer<br />

Brands are rated by food experts on a threeitem,<br />

seven-point scale. Coefficient alpha = 0.85<br />

Categories are rated by food experts on a twoitem,<br />

seven-point scale. Correlation = 0.94.<br />

Market share within product category. Based on<br />

retail scanner data from ACNielsen<br />

Dummy variable, equal <strong>to</strong> 1 if the hypothesized<br />

s<strong>to</strong>ck-out brand is the primary brand for the<br />

consumer in category X<br />

Categories are rated by food experts on regular<br />

s<strong>to</strong>ckpiling level before consumers res<strong>to</strong>ck (low,<br />

medium, high). Based on Campo, Gijsbrechts,<br />

and Nisol (2000) and Narasimhan, Neslin, and<br />

Sen (1996)<br />

Dummy variable, equal <strong>to</strong> 1 if product and<br />

brand was not planned in advance.<br />

Number of times a product is bought on a<br />

monthly basis<br />

Dummy variable, equal <strong>to</strong> 1 if the supermarket<br />

with the hypothesized s<strong>to</strong>ck-out is the primary<br />

supermarket for the consumer<br />

Number of supermarkets with a similar<br />

merchandising strategy within a radius of<br />

approximately 250 meters and/or 4 minutes<br />

walking of the supermarket where the OOS<br />

occurs. Based on general information about<br />

supermarket locations in the Netherlands<br />

(Levensmiddelenkrant 2002)<br />

Dummy variable, equal <strong>to</strong> 1 if the assortment of<br />

the supermarket is relatively wide and deep and<br />

0 if the assortment is relatively limited. Based<br />

on real assortment levels of supermarkets<br />

(internal company sources)<br />

57

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