英文文献：The Effect of Forced Choice with Constant Choice Experiment Complexity
英文文献作者：Penn, Jerrod,Hu, Wuyang,Cox, Linda J.
英文文献摘要：
In this analysis we compare WTP estimates of responses separately modelling choice sets of forced choices from those of unforced choices in order to measure the effect of forced choice in Choice experiment. This comparison is done while still maintain constant task complexity and evaluated in WTP space. We find evidence to suggest that individual WTP are different in forced and unforced choice sets and in joint tests for parameter equality.