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In contested policy issues where actual policy may be based on WTP studies, PV and DK answers may indeed affect the outcome of the WTP study.
In other situations, e.g. with contested policy issues where actual policy may be based on WTP studies, this may be different and PV and DK answers may indeed substantially affect the outcome of the WTP study.
The overall percentage of overweight and obese children taking part in this WTP study was 10.2%.
In the only WTP study in SSA (conducted among persons who were not actually testing), half were unwilling to pay any amount of money for an HIV test [14].
The results suggest that in a WTP study using the contingent valuation method, one must design a survey questionnaire with a comprehensive view that takes into account two different aspects of altruistic motivation.
We conducted a willingness-to-pay (WTP) study using contingent valuation (CV) methods in Chongqing, China to estimate the economic value of saving one statistical life through improving air quality.
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Table 1 contains Swedish WTP studies for traffic noise.
Moreover, this approach allows for WTP studies with much smaller sample sizes than traditional methods require.
In developed countries' empirical studies, trust is normally not treated as the variable of interest; hence, less focus is placed on the issue of trust in WTP studies.
To understand how people value information from diagnostic technologies, we reviewed and analyzed published willingness-to-pay (WTP) studies on the topic.
Large numbers of zero responses are common in WTP studies, and are found here; therefore, the Heckman selectivity model and log-transformed OLS are employed.
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