• The Journal of the Korea Contents Association
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• v.16 no.2
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• pp.45-56
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• 2016

This study explains about a phenomenon where the structure of the compensation plan for a single salesperson may vary as he/she gains experience. Unlike past studies that implicitly assume the limited effect on salesperson's experience, our result predicts that a salesperson will make an effort at every period early in his/her career without any commissions in order to gain experience. However, if one cannot expect any marginal returns of accumulated efforts, the sales manager must provide commissions on the high volume of sales at each period, to facilitate a high effort of a salesforce at earlier periods. Our paper provides important implications about dynamics in the compensation plan, which has not been addressed in the past studies but has frequently been witnessed in practice.

• Journal of the Korean Regional Science Association
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• v.34 no.3
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• pp.43-54
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• 2018

This paper analyzes the effects of population aging on regional differentiation from the New Economic Geography perspective. The addition of old-age population variable affects the price index, income, nominal wage, and real wage derived in the short-run equilibrium. Using the new model, we can better explain industrial agglomeration patterns corresponding to the new long-run equilibrium. As the real wage criterion does not properly take the old-age group into account, we employ the indirect utility function as an additional condition for equilibrium. We further consider tax as a policy tool for achieving a better long-run equilibrium. This would enable the government to direct the economy toward a particular equilibrium desired in the face of population aging.

• KDI Journal of Economic Policy
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• v.10 no.1
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• pp.37-61
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• 1988

본(本) 연구(硏究)는 우리나라 기업(企業)에 있어 생산량(生産量)의 변화(變化)와 노동비용구조(勞動費用構造)의 변화(變化)가 어떤 조정과정(調整過程)을 거쳐 고용(雇傭) 및 근로시간(勤勞時間)에 영향을 미치는가를 분석(分析)하는 데 그 목적(目的)이 있다. 기업(企業)이 생산요소(生産要素)로서의 노동(勞動)에 대한 수요(需要)를 조정(調整)하는 수단은 크게 고용(雇傭)과 노동시간(勞動時間)으로 나눌 수 있다. 여러 가지 경제(經濟) 사회적(社會的) 요인(要因)으로서의 개별기업(個別企業)의 비용극소화(費用極小化) 전략(戰略)은 사회적(社會的)으로 최적의 고용수준(雇傭水準)을 실현하지 못하고 낮은 고용수준(雇傭水準)과 장시간근로(長時間勤勞)를 초래한다. 노동수요요소(勞動需要要素)(고용(雇傭) 및 근로시간(勤勞時間))간(間)에 대체(代替)가 이루어지는 요인관계(要因關係)를 본고(本稿)에서는 현고용수준(現雇傭水準)과 최적고용수준(最適雇傭水準)과의 과부족이 근로시간(勤勞時間)의 조정을 유발하는 것으로 설정하여 고용수준(雇傭水準)과 근로시간(勤勞時間)에 대한 두 개의 방정식(方程式)을 시계열자료(時系列資料)를 이용하여 추정하였다. 분석결과(分析結果)를 토대로 다음과 같은 정책과제(政策課題)가 제시(提示)된다. 첫째, 기업(企業)이 단기적(短期的) 노동수요조정시(勞動需要調整時) 근로시간(勤勞時間)에 과다하게 의존하는 현상을 일시해고제(一時解雇制)를 도입하여 고용조정(雇傭調整)으로도 분산시켜야 할 것이다. 둘째, 기업(企業)의 노동비용중(勞動費用中) 기본급(基本給)의 비중(比重)을 높여 나갈 수 있도록 유도해야 하며 이를 위해 초과근로(超過勤勞)에 대한 할증임금의 인상도 검토할 만하다.

• KDI Journal of Economic Policy
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• v.30 no.1
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• pp.131-170
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• 2008

Korea's public assistance system, represented by NBLS(National Basic livelihood Security), has disclosed critical problems despite the rapid increase in its budget, such as decreasing work incentive and deepening welfare trap. These typical problems of classical welfare system have been commonly witnessed in many other advanced countries. Therefore a number of efforts have been exerted to correct these problems by transferring the existing welfare system into a welfare-to-work(or workfare) system, and the most common one of such efforts is introducing the EITC(Earned Income Tax Credit)-type programs. They have already been implemented in many countries such as the USA, the UK and France, also Korean government decided to launch EITC program in 2009. This paper aims to propose some measures to improve Korean EITC program. For this, an optimization problem is constructed from the government's viewpoint. Optimal EITC program is defined to be a solution to the problem - a combination of phase-in rate, phase-out rate, and maximum credit that maximizes labor supply increase under a exogenously given budget constraint. Using a mechanism design analysis, we derive and characterize the optimal EITC program. Analysis results implies that Korean EITC structure needs to be modified so that phase-in rate is larger than phase-out rate and the upper limit of phase-out range becomes larger. Comparative static analysis results show that the feature of the optimal EITC program is sensitive to the change of income distribution, suggesting that if beneficiaries are categorized into different income groups, then it is desirable to apply distinctive EITC programs to each group.

• Journal of the Korean Society of Food Science and Nutrition
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• v.38 no.6
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• pp.727-731
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• 2009

Effects of various plasticizers (1.5%) such as glycerol, sorbitol, fructose, sucrose, and polypropylene glycol, and ferulic acid on the physical properties of Gelidium corneum (GC) film were examined. GC films containing plasticizer and ferulic acid were prepared by incorporating various amounts (10, 30, 50, 70, 100 mg/100 mL) of ferulic acid into the film. Water vapor permeability (WVP) of the GC film varied depending on the type of plasticizer, and among them the film containing sucrose had the lowest WVP. Tensile strength (TS) and % elongation (%E) of the film were in the range of $1.29{\sim}11.29$ MPa and $5.55{\sim}36.44$ %, respectively, and the WVP values were of $1.30{\sim}1.60\;ng\;m/m^{2}sPa$. In addition, the GC films were prepared using ferulic acid as a cross-linking agent. WVP of the film decreased with the addition of ferulic acid, and the film containing 30 mg ferulic acid had the lowest WVP value. TS value of the GC film containing 10 mg of ferulic acid was significantly higher than that of the control. However, further increase of ferulic acid concentration decreased the TS value. Therefore, 10 mg of ferulic acid was determined to be the optimal concentration for the film.

• Korean Journal of Social Welfare Studies
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• v.42 no.3
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• pp.291-327
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• 2011

The purpose of this study is to classify the type of retirement process among the mature-aged in Korea. The study used the panel data from Korean Labor Panel (year2~6) for the classification of retirement process through Optimal Matching and Cluster Analysis. Classification is made in 5 categories as 'peripheral-economically active', 'private-transfer dependent', 're-entering limited', 'securely exiting', 'exit-and-reentering'. First, "peripheral-economically active" is a group which frequently experienced job status change and work insecurity. Second, "private-transfer dependent" is a group in which private transfer is likely to be supplements income in the incidence of unemployment. Third, "re-entering limited" is a group in which the proportion of no financial support combined with the absence of any economic activity is the largest. Fourth, the type "Securely exit" is th group whose members switches over to non-economically active status with pension receipt. The last type is "exit-and-reenter" that the member are highly possible to reenter in the labor market and stay in long time regardless of with or without pension plan. To examine the inequality among the types of retirement process, the duration of each status is analyzed. First, in the situation of being non-economically active, the duration of status is maintain public pension receiving and duration stabile in "securely exit" group. For "private-transfer dependent" type, members are mostly dependent on private financial support and that duration of it is longest. Through the analysis of retirement process without under other financial supports, it is "securely-exiting" type for which the duration of full-time employment is longest. It appears that the duration of part-time employment is longest in "peripheral-economically active" type. And for the case of non-waged employment it is "exit-and-reenter" type. Finally, the redistribution policy based on life course perspective is necessary to prevent that the opportunity in the structure before retirement stage and the unfavorable position in labor market make worse disadvantage in retirement process and after that.