Prevalence of Missing Values and Protest Zeros in Contingent Valuation in Dental Medicine.

ABSTRACT:

Background

The number of contingent valuation (CV) studies in dental medicine using willingness-to-pay (WTP) methodology has substantially increased in recent years. Missing values due to absent information (i.e., missingness) or false information (i.e., protest zeros) are a common problem in WTP studies. The objective of this study is to evaluate the prevalence of missing values in CV studies in dental medicine, to assess how these have been dealt with, and to suggest recommendations for future research.

Methods

We systematically searched electronic databases (MEDLINE, Web of Science, Cochrane Library, PROSPERO) on 8 June 2021, and hand-searched references of selected reviews. CV studies in clinical dentistry using WTP for valuing a good or service were included.

Results

SUBMITTER: Sendi P 

PROVIDER: S-EPMC8307611 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature