FIG 113. EXAMPLE OF MODELLING IN PRACTICE (1):
Gliss haircare products, Sweden
Based on weekly sales of Gliss shampoo, conditioner and treatment products, week 41 2009 to week 20 2011. Source: Ohal econometric modelling for Schwarzkopf, Sweden, 2011 
 ECONOMETRIC MODELS
Q: When to use Gliss flyers (e.g. money-off coupons)?
A: Alongside magazine advertising, or 1-2 weeks after TV
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