nep-res New Economics Papers
on Resource Economics
Issue of 2008‒04‒21
two papers chosen by
Maximo Rossi
Universidad de la Republica

  1. Testing the Validity of WTP values from a Contingent Valuation Survey in Portugal By Paulo Augusto Nunes
  2. Measuring the WTP for Recreation and Biodiversity Protection Programs By Paulo Augusto Nunes

  1. By: Paulo Augusto Nunes
    Abstract: This paper explores the statistical validity of the willingness to pay (WTP) answers from a contingent valuation (CV) survey concerning value assessment of recreation and biodiversity protection programs. Firstly, we use a non-parametric testing approach as to evaluate the whether (a) different information levels concerning the government costs with the Park and (b) different payment vehicles influence the stated WTP responses. Secondly, we use a parametric model specification as to investigate the impact of the elicitation question format on the stated WTP responses. The likelihood ratio test results, at 95% confidence level, confirm the validity of the proposed survey a measurement instrument. Nevertheless, the presence of free riding turns out to be statistically significant in one of the survey versions. The parametric model results suggest that the differences in the mean WTP estimates across the two question formats are not statistically different. Furthermore, the double bounded dichotomous choice model value estimates point out that the WTP for the recreation protection program is lower than the WTP for the biodiversity protection program, thus confirming the importance of non-use value component of the Natural Area.
    Date: 2008–03
  2. By: Paulo Augusto Nunes
    Abstract: This paper focus on a contingent valuation (CV) exercise as to compute estimates for the willingness to pay (WTP) for recreation and biodiversity benefits of a Natural Park in Portugal. The CV survey gathers 1678 respondents and three development policy options. We refer to the Wilderness Areas (WA) tourism development scenario; the Recreational Areas (RA) tourism development scenario and, finally, a scenario version which is characterised by the tourism development of both WA and RA. The results show that the respondents evaluate the WA and RA differently. However, we find no statistical difference between the WTP for the WA and the WTP for the WA jointly with the RA. The last result can be interpreted as an indicator of an eventual presence of warm-glow in the WTP responses.
    Date: 2008–03

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