Are Internet Surveys an Alternative to Face-to Face Interviews in Contingent Valuation?

34 Pages Posted: 6 Nov 2008 Last revised: 19 Nov 2012

See all articles by Henrik Lindhjem

Henrik Lindhjem

Norwegian Institute for Nature Research

Stale Navrud

School of Economics and Business, Norwegian University of Life Sciences (NMBU)

Date Written: May 10, 2011

Abstract

Internet is an increasingly popular data collection mode for stated preference research in environmental economics. However, little is known about how this survey mode may influence data quality and welfare estimates. As part of a national contingent valuation (CV) survey estimating willingness to pay (WTP) for biodiversity protection plans, we assign two groups of respondents either to an Internet or face-to-face (in-home) interview mode. Our design aims to better isolate measurement effects from sample composition effects by drawing both samples from the same sample frame. We find little evidence of social desirability bias in the interview setting or satisficing (shortcutting the response process) in the Internet survey. The share of “don’t knows”, zeros and protest responses to the WTP question with a payment card is very similar between modes and equality of mean WTP cannot be rejected. Results are fairly encouraging for the use of Internet in CV as stated preferences do not seem to be significantly different or biased compared to face-to-face interviews.

Keywords: Internet, contingent valuation, interviews, survey mode, willingness to pay

JEL Classification: Q51, H41

Suggested Citation

Lindhjem, Henrik and Navrud, Stale, Are Internet Surveys an Alternative to Face-to Face Interviews in Contingent Valuation? (May 10, 2011). Ecological Economics, Vol. 70, No. 9, 2011, Available at SSRN: https://ssrn.com/abstract=1295521 or http://dx.doi.org/10.2139/ssrn.1295521

Henrik Lindhjem (Contact Author)

Norwegian Institute for Nature Research ( email )

Gaustadalléen 21
Oslo, NO-0349
Norway

HOME PAGE: http://www.lindhjem.info

Stale Navrud

School of Economics and Business, Norwegian University of Life Sciences (NMBU) ( email )

PO Box 5033
Aas, 1432
Norway

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