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Ulf-g. Gerdtham - One of the best experts on this subject based on the ideXlab platform.
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Willingness to Pay for antihypertensive therapy further results
Journal of Health Economics, 1993Co-Authors: Magnus Johannesson, Perolov Johansson, Bengt Kriström, Ulf-g. GerdthamAbstract:Abstract A measurement experiment regarding Willingness to Pay for antihypertensive therapy is reported. A new type of binary Willingness to Pay question is used, that allows for different degrees of certainty with respect to the responses. Mean Willingness to Pay is derived from a simple expected utility model and estimated using maximum likelihood methods. The estimated parameters are highly significant, with predicted signs, and imply a mean Willingness to Pay of about SEK 800 ($130) per month. The explanatory power of the equation that only includes ‘certain’ yes/no responses is, as expected, much higher than that of the equation where only ‘uncertain’ responses are included.
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Willingness to Pay for antihypertensive therapy further results
Journal of Health Economics, 1993Co-Authors: Magnus Johannesson, Perolov Johansson, Bengt Kriström, Ulf-g. GerdthamAbstract:Abstract A measurement experiment regarding Willingness to Pay for antihypertensive therapy is reported. A new type of binary Willingness to Pay question is used, that allows for different degrees of certainty with respect to the responses. Mean Willingness to Pay is derived from a simple expected utility model and estimated using maximum likelihood methods. The estimated parameters are highly significant, with predicted signs, and imply a mean Willingness to Pay of about SEK 800 ($130) per month. The explanatory power of the equation that only includes ‘certain’ yes/no responses is, as expected, much higher than that of the equation where only ‘uncertain’ responses are included.
Magnus Johannesson - One of the best experts on this subject based on the ideXlab platform.
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eliciting Willingness to Pay without bias evidence from a field experiment
The Economic Journal, 2008Co-Authors: Karen Blumenschein, Magnus Johannesson, Glenn C Blomquist, Nancy Horn, Patricia R FreemanAbstract:Concern exists that hypothetical Willingness to Pay questions overestimate real Willingness to Pay. In a field experiment, we compare two methods of removing hypothetical bias, a cheap talk approach and a certainty approach, with real purchases. We find evidence of hypothetical bias for unadulterated contingent valuation. Contingent valuation with certainty statements removes the hypothetical bias, but the cheap talk approach has no significant impact. Our findings suggest that Willingness to Pay can be accurately estimated by adding a simple follow-up question about the certainty of responses and that cheap talk is not a generally effective approach.
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Willingness to Pay for reduced incontinence symptoms.
BJUI, 1997Co-Authors: Magnus Johannesson, Richard M. O'conor, G. Kobelt‐nguyen, Anders MattiassonAbstract:Objective to measure the Willingness to Pay for a reduction in the number of micturitions and urinary leakages for patients with urge incontinence. Patients and methods A self-administered questionnaire with a binary Willingness-to-Pay question was administered to 541 patients in Sweden with urge or mixed incontinence; 461 questionnaires were returned. The reduction in micturitions and urinary leakages valued in the Willingness-to-Pay question was varied randomly between 25% and 50% in two different subsamples. Information was also collected about the number of micturitions and urinary leakages, health-related quality of life and socio-economic characteristics of the patients in the study. Results Quality of life was significantly related to the severity of the symptoms and was worse than that of the sex- and age-matched general Swedish population. The median (mean) Willingness to Pay per month was 240 (530) Swedish krona (SEK, £1=SEK 11.50) for a 25% reduction in micturitions and leakages and SEK 470 (1030) for a 50% reduction in micturitions and leakages. As hypothesized, the Willingness to Pay was significantly related to the size of the reduction in micturitions and leakages, the initial number of micturitions and leakages, and income. Conclusions Patients with incontinence problems are willing to Pay substantial amounts for a reduction in the number of micturitions and leakages.
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Patients' Willingness to Pay for autologous blood donation☆
Health Policy, 1997Co-Authors: Stephanie J. Lee, Peter J Neumann, W. Hallowell Churchill, Marie E. Cannon, Milton C. Weinstein, Magnus JohannessonAbstract:Most cost-effectiveness analyses of autologous blood donation show very small health benefits for a substantial increase in resource utilization. However, these analyses do not consider the psychological benefits of peace of mind to patients participating in the program. In order to quantitate these benefits, we employed contingent valuation methodology to measure the Willingness of patients undergoing elective surgery, to Pay for autologous blood donation. The internal consistency of patient responses was investigated through correlations of Willingness-to-Pay values with risk perceptions and patient characteristics. Two hundred and thirty-five patients completed the self-administered questionnaire which included demographic, Willingness-to-Pay and risk perception questions. Median population Willingness to Pay for autologous blood donation was approximately $900 per patient. In multivariate analysis, Willingness to Pay varied significantly with dread of allogenic transfusion, perceived risk of requiring a blood transfusion and income. Patients who participate in autologous blood donation programs value the procedure highly and state they are willing to Pay significant amounts out of pocket to assure themselves of available autologous blood. Willingness to Pay correlated significantly with factors expected to influence value decisions.
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Willingness to Pay for antihypertensive therapy further results
Journal of Health Economics, 1993Co-Authors: Magnus Johannesson, Perolov Johansson, Bengt Kriström, Ulf-g. GerdthamAbstract:Abstract A measurement experiment regarding Willingness to Pay for antihypertensive therapy is reported. A new type of binary Willingness to Pay question is used, that allows for different degrees of certainty with respect to the responses. Mean Willingness to Pay is derived from a simple expected utility model and estimated using maximum likelihood methods. The estimated parameters are highly significant, with predicted signs, and imply a mean Willingness to Pay of about SEK 800 ($130) per month. The explanatory power of the equation that only includes ‘certain’ yes/no responses is, as expected, much higher than that of the equation where only ‘uncertain’ responses are included.
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Willingness to Pay for antihypertensive therapy further results
Journal of Health Economics, 1993Co-Authors: Magnus Johannesson, Perolov Johansson, Bengt Kriström, Ulf-g. GerdthamAbstract:Abstract A measurement experiment regarding Willingness to Pay for antihypertensive therapy is reported. A new type of binary Willingness to Pay question is used, that allows for different degrees of certainty with respect to the responses. Mean Willingness to Pay is derived from a simple expected utility model and estimated using maximum likelihood methods. The estimated parameters are highly significant, with predicted signs, and imply a mean Willingness to Pay of about SEK 800 ($130) per month. The explanatory power of the equation that only includes ‘certain’ yes/no responses is, as expected, much higher than that of the equation where only ‘uncertain’ responses are included.
Timothy C. Haab - One of the best experts on this subject based on the ideXlab platform.
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Temporal insensitivity of Willingness to Pay and implied discount rates
Resource and Energy Economics, 2009Co-Authors: Sooil Kim, Timothy C. HaabAbstract:A number of studies have defined and tested the temporal sensitivity of Willingness to Pay to Payment schemes and the resulting implied discount rates for environmental projects. We demonstrate that those studies have imposed restrictive assumptions on the structure of the Willingness to Pay function and the underlying decision process. We investigate the temporal sensitivity of Willingness to Pay using a new temporal Willingness to Pay function applied to a proposed oyster reef restoration program. We find that (1) holding the length of the project constant, the temporal Willingness to Pay for the project is the same across different Payment schemes, (2) temporal Willingness to Pay does not vary significantly across projects of varying lengths, and (3) estimated discount rates are low relative to previous studies, but vary significantly across Payment schemes and project lengths.
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CUStoMER Willingness to Pay FOR MULTI-INGREDIENT, PROCESSED ORGANIC FOOD PRODUCTS
2004Co-Authors: Marvin T. Batte, Jeremy Beaverson, Neal H. Hooker, Timothy C. HaabAbstract:This is a report of a customer intercept survey of customers in seven central Ohio grocery stores. Six were conventional stores of a national grocery chain (Traditional Grocery); of these, two were suburban , two were city central, and two were in predominately rural locations. The seventh store was a health/whole foods store (Specialty Grocery). The survey addressed customer Willingness to Pay for alternative levels of organic content in breakfast cereals, customer purchase patterns for organic foods, and customer opinions about the benefits of organic and other food characteristics. Forty-two percent of traditional grocery shoppers reported purchases of organic foods, the majority purchasing at least twice monthly. Shoppers in the specialty grocery were much more likely to purchase organic foods (92 percent). Consumers indicated a Willingness to Pay higher prices for processed foods with organic content. This Willingness to Pay varied with income and demographic characteristics of the households. Specialty grocery shoppers were more likely to purchase organic foods than their traditional grocery counterparts, and had a greater Willingness to Pay for these products.
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referendum models and negative Willingness to Pay alternative solutions
Journal of Environmental Economics and Management, 1997Co-Authors: Timothy C. Haab, Kenneth E McconnellAbstract:Traditional referendum models of contingent valuation with linear utility functions and additive errors have troubled researchers because they routinely predict negative Willingness to Pay. We explore solutions to this problem, including parametric models and the Turnbull empirical distribution estimator of Willingness to Pay exploited by Carsonet al.We show that there are closed form solutions for estimates of the empirical distribution function from the Turnbull likelihood maximization problem which correspond to the self-consistency algorithm proposed by Turnbull and the pooled adjacent violators algorithm (PAVA) described by Robertson, Wright, and Dykstra and implemented by21. Further, a lower bound estimate of Willingness to Pay and the associated variance can be calculated by hand. The Turnbull estimator solves the problem of estimating negative Willingness to Pay without resorting to ad hoc distribution assumptions. It is shown that central tendency measures of Willingness to Pay from parametric models are sensitive to the assumed distribution, while the lower bound Turnbull estimate is robust across distributions.
Perolov Johansson - One of the best experts on this subject based on the ideXlab platform.
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Willingness to Pay for antihypertensive therapy further results
Journal of Health Economics, 1993Co-Authors: Magnus Johannesson, Perolov Johansson, Bengt Kriström, Ulf-g. GerdthamAbstract:Abstract A measurement experiment regarding Willingness to Pay for antihypertensive therapy is reported. A new type of binary Willingness to Pay question is used, that allows for different degrees of certainty with respect to the responses. Mean Willingness to Pay is derived from a simple expected utility model and estimated using maximum likelihood methods. The estimated parameters are highly significant, with predicted signs, and imply a mean Willingness to Pay of about SEK 800 ($130) per month. The explanatory power of the equation that only includes ‘certain’ yes/no responses is, as expected, much higher than that of the equation where only ‘uncertain’ responses are included.
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Willingness to Pay for antihypertensive therapy further results
Journal of Health Economics, 1993Co-Authors: Magnus Johannesson, Perolov Johansson, Bengt Kriström, Ulf-g. GerdthamAbstract:Abstract A measurement experiment regarding Willingness to Pay for antihypertensive therapy is reported. A new type of binary Willingness to Pay question is used, that allows for different degrees of certainty with respect to the responses. Mean Willingness to Pay is derived from a simple expected utility model and estimated using maximum likelihood methods. The estimated parameters are highly significant, with predicted signs, and imply a mean Willingness to Pay of about SEK 800 ($130) per month. The explanatory power of the equation that only includes ‘certain’ yes/no responses is, as expected, much higher than that of the equation where only ‘uncertain’ responses are included.
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Willingness to Pay measures and expectations: an experiment
Applied Economics, 1990Co-Authors: Perolov JohanssonAbstract:In studies of the Willingness to Pay for various environmental commodities/services, it is typically explicitly or implicitly assumed that the respondent has perfect has perfect foresight. This paper, which is based on a questionnaire completed by examining if and how the value of a hunting permit is affected by the hunter's expectations regarding the outcome of the hunting. In particular, the Willingness to Pay is estimated as a function of expected values as well as variances of different variables. Using a question which reflects an extension of Jensen's inequality to the multivariate case, as well as measures of downside risk, it is shown that risk attitudes are important determinants of the Willingness to Pay for a hunting permit.
Bengt Kriström - One of the best experts on this subject based on the ideXlab platform.
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Willingness to Pay for antihypertensive therapy further results
Journal of Health Economics, 1993Co-Authors: Magnus Johannesson, Perolov Johansson, Bengt Kriström, Ulf-g. GerdthamAbstract:Abstract A measurement experiment regarding Willingness to Pay for antihypertensive therapy is reported. A new type of binary Willingness to Pay question is used, that allows for different degrees of certainty with respect to the responses. Mean Willingness to Pay is derived from a simple expected utility model and estimated using maximum likelihood methods. The estimated parameters are highly significant, with predicted signs, and imply a mean Willingness to Pay of about SEK 800 ($130) per month. The explanatory power of the equation that only includes ‘certain’ yes/no responses is, as expected, much higher than that of the equation where only ‘uncertain’ responses are included.
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Willingness to Pay for antihypertensive therapy further results
Journal of Health Economics, 1993Co-Authors: Magnus Johannesson, Perolov Johansson, Bengt Kriström, Ulf-g. GerdthamAbstract:Abstract A measurement experiment regarding Willingness to Pay for antihypertensive therapy is reported. A new type of binary Willingness to Pay question is used, that allows for different degrees of certainty with respect to the responses. Mean Willingness to Pay is derived from a simple expected utility model and estimated using maximum likelihood methods. The estimated parameters are highly significant, with predicted signs, and imply a mean Willingness to Pay of about SEK 800 ($130) per month. The explanatory power of the equation that only includes ‘certain’ yes/no responses is, as expected, much higher than that of the equation where only ‘uncertain’ responses are included.
