トラベルコスト法における代替地価格問題のMultiple Indicatorによる解決

静岡県大井川上流部を事例として

抄録

In the travel cost method, the substitute price problem has been discussed for a long time. How-ever a consistent solution hasn't been represented yet. If the substitute price is omitted or measured in error, the estimators are inconsistent, and then the estimator of benefit is also inconsistent. But in most applications of the travel cost method, the substitute price is omitted, and even if the substitute price is included, it is likely to be measured in error because of data availability; as a result, theestimators would be inconsistent.
In this paper, in order to mitigate the omitted variable and measurement error problem, I include the substitute price in estimation and apply the Poisson 2SQML model using multiple indicators of the substitute price.
It is found that the estimators derived by a conventional model differ from those derived by the new method represented in this paper.