• 한국유기농업학회지
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• 제26권4호
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• pp.543-558
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• 2018

The purpose of this study is to analyze the amount of willingness to pay for environment-friendly agricultural processed foods by the level of consumption intention. To accomplish the objective of the study a consumer survey was conducted for quantitative analysis regarding consumption pattern. The ordered-probit selection model, Heckman-type two-stage method was employed for an empirical analysis on determining the amount of willingness to pay. The estimation results showed that in the case of consumers who are to keep their consumption at the present level, those with high quality contentment compared to price, brand contentment, and purchasing chiefly in the special store, have the higher amount of willingness. The estimation results also showed that in the case of consumers who are to increase their consumption, those with high quality contentment compared to price, brand contentment, certificate contentment, and having family members who suffer from diseases such as atopy, cancer, diabetes, high blood pressure, have the higher amount of willingness. Therefore For those who are to increase their consumption, enhancement of quality, enhancement of contentment with certificate, promotion are useful to increase the amount of willingness to pay.

• International Journal of Human Ecology
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• 제4권2호
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• pp.77-87
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• 2003

This paper tried to construct statistical and econometric models on the basis of economic theory in order to discuss the issue of statistical efficiency and unbiasedness including the sample selection bias correcting problem. Comparative analytical tool were one stage Tobit of Maximum Likelihood estimation and Heckman's two-step Tobit of Ordinary Least Squares. The results showed that the adequacy of model for the analysis on demand and choice, we believe that there is no big difference in explanatory variables between the first selection model and the second linear probability model. Since the Lambda, the self- selectivity correction factor, in the Type II Tobit is not statistically significant, there is no self-selectivity in the Type II Tobit model, indicating that Type I Tobit model would give us better explanation in the demand for and choice which is less complicated statistical method rather than type II model.

• 노동경제논집
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• 제33권2호
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• pp.135-164
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• 2010

본 연구는 기술진보의 소득증대 효과가 근로자의 직무(숙련) 특성에 따라 다를 것이라는 전제 하에, 산업간 기술격차가 근로소득에 미치는 영향을 자영업과 임금근로로 나누어 비교 분석하였다. 실증분석에는 한국노동패널조사(KLIPS) 자료를 사용하였고, 2단계 추정법과 분위회귀분석을 사용하였다. 분석 결과, 임금근로(직업특수적 숙련)에 대해서는 기술진보의 소득증대 효과가 고학력자에 집중되는 반면, 자영업주(경영가적 숙련)에 대해서는 기술진보의 소득중대 효과가 모든 학력계층에서 나타났다. 이러한 부문별 차이는 분위회귀분석에서도 동일하게 나타난다.