[Limdep Nlogit List] willingness to pay

[Philomela at gmx.net]

Dear all, 
For the calculation of willingnes to pay, i have two questions:
1. What do I have to consider when using dummy coded attributes and what when using effects coded attributes?
2. Do I also have to include interactions with the price variable into the calculation?
I hope very much that you may help me, thanks very much in advance!
Philio

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