جستجوی مقالات مرتبط با کلیدواژه "انتخاب دوگانه" در نشریات گروه "اقتصاد کشاورزی"

Wetlands are vital to the supply of valued ecosystem services. The restoration and preservation programs of wetlands would increase the supply of ecosystem services. This paper aims to estimate the total economic value of the restoration and preservation programs of Jazmourian wetland in Kerman. Data required for the analysis was taken from 312 households interviews in the regions of Jazmourian wetland in 1917. In the first, this paper employs Cooper's method for optimal survey design for the dichotomous choice contingent valuation method. This method finds the bid amounts as well as the sample size corresponding to each bid. Then, Logit and ordinary least square models were estimated for the total economic value of the wetland restoration and preservation programs. The result shows that, based on the population of Jazmourian wetland around regions, the estimated total economic value of the wetland restoration and preservation programs ranges from 34.412 to 63.566 billion Rials per year. These estimates may be used to justify the level of expenditure on the restoration and preservation programs of Jazmourian wetland.

Wetlands are vital to the supply of valued ecosystem services. The restoration and preservation programs of wetlands will increase the supply of ecosystem services. This paper aimed to estimate the total economic value of the restoration and preservation programs of Jazmourian wetland in Kerman. Data required for the analysis was taken from 312 households interviews in the around regions of Jazmourian wetland in 1396. In the first, this paper employs Cooper's method for optimal survey design for the dichotomous choice contingent valuation method. This method finds the bid amounts as well as the sample size corresponding to each bid. Then, Logit and ordinary least square models were estimated for the total economic value of the wetland restoration and preservation programs. The result shows that, based on the population of Jazmourian wetland around regions, the estimated total economic value of the wetland restoration and preservation programs ranges from 34.412 to 63.566 billion Rials per year. These estimates may be used to justify the level of expenditure on the restoration and preservation programs of Jazmourian wetland.

Dichotomous choice contingent valuation method is used to estimate non-market values. This method has some disadvantages، including whether the statistical method used to estimate the willingness to pay is the correct choice or not. This study، for the first time in the country، makes use of a nonparametric method to estimate the willingness to pay for the protection of Chandelier Lily flower in Gilan province and compare the results with those of the parametric method. To compare these methods، distributive parameters of willingness to pay (including mean، standard deviation، t-statistics and confidence interval) are calculated and compared. The study results show that the mean amounts of willingness to pay estimated in the parametric and nonparametric methods are 6540. 33 and 8131. 79 Rials and their t-statistics are 10. 71 and 14. 41، respectively. Also، the t-statistics is calculated 1. 91 for the equality of two means، showing that the obtained amounts of mean willingness to pay using these methods are not significantly different at 5%. This indicates that the chosen distribution form for estimating the amounts of willingness to pay is correct for parametric method. Finally، it is suggested that policy and decision makers in the context of natural and environmental resources be very careful when using the calculated willingness to pay، awaring of the method used for calculation and the assumptions considered.