I am following up on my last post, which introduced the problem of excess zeros in counts of recreational visits. … More

# Category: glm

# Handling Excess Zeros in TCM (1): The data generation process

Revealed Preference surveys ask respondents to report their visitation patterns during a given time period. Respondents report the number of … More

# Count Data & Overdispersion

This week I am writing about how to estimate count data models in R. Similarly to last week, I am … More

# Plotting the demand for recreation

This week I am focusing again on the travel cost method. The difficulty with valuing recreational sites is that they typically … More

# Analyzing CV data with Probit and Logit models

In my previous post, I showed how to analyze contingent valuation (CV) data using the linear probability model. In this … More