금연법 강화가 흡연에 미치는 영향

김범수,김아람,Kim, Beomsoo,Kim, Ahram 한국개발연구원 2009 韓國 開發 硏究 Vol.31 No.2

국내외적으로 간접흡연이나 환경 속 담배연기가 미칠 수 있는 해악에 대한 관심이 고조되고 있으며, 그 결과 작업공간 내 금연정책이 점차 늘어나고 있다. 한국에서도 작업공간 내 금연정책이 2003년 국민건강증진법 개정으로 훨씬 강화되었다. 본 논문에서는 2001년과 2005년에 이루어진 국민건강영양조사를 이용하여 강화된 금연정책이 흡연율과 일평균 흡연 개비 수에 미친 영향을 분석하고자 한다. 금연법강화가 실내 작업공간 위주로 이루어진 점에 착안하여 법 개정의 영향을 많이 받은 실내근무자 직업군과 영향을 비교적 덜 받는 실외근무자 직업군을 비교하였다. 추정 결과, 금연법 강화로 95% 수준에서 유의하게 흡연율은 4.1%p 감소하였고, 흡연자 중 일평균 흡연 개비는 2.5개비 줄어든 것으로 나타났다. There is a growing concern about potential harmful effect of second-hand or environmental tobacco smoking. As a result, smoking bans in workplace become more prevalent worldwide. In Korea, workplace smoking ban policy become more restrictive in 2003 when National health enhancing law was amended. The new law requires all office buildings larger than 3,000 square meters (multi-purpose buildings larger than 2,000 square meters) should be smoke free. Therefore, a lot of indoor office became non smoking area. Previous studies in other counties often found contradicting answers for the effects of workplace smoking ban on smoking behavior. In addition, there was no study in Korea yet that examines the causal impacts of smoking ban on smoking behavior. The situation in Korea might be different from other countries. Using 2001 and 2005 Korea National Health and Nutrition surveys which are representative for population in Korea we try to examine the impacts of law change on current smoker and cigarettes smoked per day. The amended law impacted the whole country at the same time and there was a declining trend in smoking rate even before the legislation update. So, the challenge here is to tease out the true impact only. We compare indoor working occupations which are constrained by the law change with outdoor working occupations which are less impacted. Since the data has been collected before (2001) and after (2005) the law change for treated (indoor working occupations) and control (outdoor working occupations) groups we will use difference in difference method. We restrict our sample to working age (between 20 and 65) since these are the relevant population by the workplace smoking ban policy. We also restrict the sample to indoor occupations (executive or administrative and administrative support) and outdoor occupations (sales and low skilled worker) after dropping unemployed and someone working for military since it is not clear whether these occupations are treated group or control group. This classification was supported when we examined the answers for workplace smoking ban policy existing only in 2005 survey. Sixty eight percent of indoor occupations reported having an office smoking ban policy compared to forty percent of outdoor occupation answering workplace smoking ban policy. The estimated impacts on current smoker are 4.1 percentage point decline and cigarettes per day show statistically significant decline of 2.5 cigarettes per day. Taking into account consumption of average sixteen cigarettes per day among smokers it is sixteen percent decline in smoking rate which is substantial. We tested robustness using the same sample across two surveys and also using tobit model. Our results are robust against both concerns. It is possible that our measure of treated and control group have measurement error which will lead to attenuation bias. However, we are finding statistically significant impacts which might be a lower bound of the true estimates. The magnitude of our finding is not much different from previous finding of significant impacts. For cigarettes per day previous estimates varied from 1.37 to 3.9 and for current smoker it showed between 1%p and 7.8%p.

고등학교의 남녀공학 여부가 대입수능에 미치는 영향

김범수,김가영,Kim, Beomsoo,Kim, Ga-young 한국개발연구원 2015 KDI Journal of Economic Policy (KDI JEP) Vol.37 No.-

Park et al. (2012) examined the impacts of coeducation in high school on the college scholastic ability test using random assignment in Seoul high schools. However, the student random assignment in Seoul within a school district was performed only within 30 min commutable areas using public transportation and Park et al. (2012) did not aware of this rule. This paper reexamines the question by matching nearest two single sex schools with a coeducation school within a school district. We found single sex school students achieve higher test score than that of coeducation school for both male and female. The magnitude of test score improvement for female is smaller than that of Park et al. (2012). However, the magnitude for male is bigger than that of Park et al. (2012).

특이 섭동 시간지연 시스템의 안정성 분석

김범수(Beomsoo Kim),권재성(Jaesung Kwon) 한국마린엔지니어링학회 2018 한국마린엔지니어링학회지 Vol.42 No.7

수치해석 자동화를 통한 흙막이 벽체 설계 파라미터 최적화 연구

김범수(Kim, Beomsoo),정진탁(Jeong, Jintag),허인영(Heo, Inyoung),윤희정(Youn, Heejung) 대한토목학회 2024 대한토목학회 학술대회 Vol.2024 No.10

Does Real-Time Navigation Affect Traffic Efficiency?

김범수(Beomsoo Kim) 고려대학교 미래성장연구소 2021 미래성장연구 Vol.7 No.2

A considerable number of people use real-time navigation through smartphone applications. In this study, we analyze the effects of real-time navigation on the speed of vehicles. As data on the number of real-time navigation users on the road is unavailable, we have used the number of smartphone users as a proxy. We focus on two parallel highways built on the north and the south sides of the Han river in Seoul; these highways are connected by some bridges and drivers have an option to switch to another highway with the help of real-time navigation if they can travel faster. We found that an increase in real-time navigation users decreases the speed gap between the two highways. This improvement was more significant during off-peak hours and when a switch option between the highways was available.

록업 클러치의 완전 직결에 의한 연비 및 동특성 분석

김범수(Beomsoo Kim),정원빈(Wonbin Jung),임원식(Wonsik Lim),차석원(Suk-Won Cha),안성훈(Sung-Hoon Ahn),김현철(Hyun-Chul Kim),장재덕(JaeDuk Jang) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2007 No.11

우리나라 가계 교통비 빈곤구조 분석

김범수(Kim, Beomsoo),이재민(Lee, Jaimin) 한국경제통상학회 2015 경제연구 Vol.33 No.3

본 연구에서는 우리나라 가계 교통비 지출구조를 분석하면선 빈곤구조에 포커스를 맞추어 실증분석을 시도하였다. 통계청 가계동향조사 연도별 자료와 빈곤지수 및 TIP 곡선을 이용하여 가계 교통비 지출 구조를 분석하였다. 그리고 교통비 지출 빈곤구조 비교를 위하여 전체 소비지출의 빈곤구조도 동일하게 분석하였으며 노인가구 및 1인 가구의 교통비 및 소비지출 빈곤구조도 분석하였다. 교통비 지출은 다른 소비지출에 비해 빈곤수준(incidence)과 정도(intensity)가 매우 높은 수준이며 노인 가구 및 1인 가구의 경우에도 빈곤수준과 정도가 높아서 저출산 및 고령화가 지속될 경우에 교통비 지출의 빈곤구조가 심화될 여지가 있었다. 실증분석에 기반하여 본 연구에서는 최저 교통비 법령화를 제안하였고 노인 및 1인 가구에 대한 교통비 지원정책을 필요성을 강조하였다. This study is to analyze the household transport expenditure in Korea and make empirical analyses on its poverty structure. In order to do that, we make use of household survey data of Korea Statistical Office and poverty index and Three ‘I’s of poverty(TIP) curve. To compare it with consumption structure, we analyze the poverty structure of household consumption in Korea, and investigate senior household and one-member household consumption and transport expenditure. The poverty level and intensity of transport expenditure are severe relative to those of consumption expenditure. Those of transport expenditure in senior and one-member households are more severe than those of consumption expenditure. We expect that low fertility and ageing makes poverty structure of transport expenditure deepen. We suggest that we should establish a code about minimum transport expenditure and that Korean government should supply support policies for senior and one-member households.

지방정치 공천권력의 변화

김범수(Beomsoo Kim),서정민(Jungmin Seo) 한국정당학회 2015 한국정당학회보 Vol.14 No.2

본 연구는 정당의 내적 구조가 시민사회의 역량강화와 정당 내 경쟁의 심화라는 요인에 의해 다원적 권력구조로 변화함을 지방정당조직의 공천권력에 대한 질적 연구를 통해 분석하였다. 정당추천이 허용되지 않았던 2002년 이전에 정당추천은 정치적 가치를 갖지 못하여 정당추천을 위한 후보경쟁이 발생하지 않았고, 정당추천은 지역위원장과 후보 사이의 후견주의 관계에 의해 결정되었다. 2006년 정당공천제 도입 이후 정당공천이 당락을 결정짓게 되자 후견주의관계에서 후견인이었던 지역위원장은 독점적 권력자가 되어 공천권력을 지배했다. 그러나 공천을 얻기 위한 당내 후보들의 경쟁이 점차 심화되면서 지역위원장의 일방적 결정은 저항에 직면하는데, 2014년 정당민주화에 대한 시민사회의 요구에 부응하려는 중앙당의 상향식 공천방식의 제도화는 지방정당조직의 공천권력을 공천심사위원회, 후보들, 지역위원장, 그리고 선거인단이 함께 공유하는 다원적 구조로 변화시켰다. This study argues that the power structure of local politics gradually became pluralistic as multiple actors started to share the power to nominate party candidates. The nomination power structure between 1991 and 2002 could be explained as a patron-client model because of the nonpartisan election system and low level competition. As party nomination was legalized since 2006, the local party boss’s nomination power has dramatically increased. Yet, as the party nomination increasingly became a determining factor of local election results, the competition among candidates to be nominated as a party candidate also increased. It deliminted the local party boss’ power. Consequently, Korean political parties had to improve nomination process to obtain trust from the voters. Major parties have institutionalized balance and check system for party nomination processes in the party chapters. As a result, the nomination committee, selectorate, and candidates themselves became significant actors in local party nomination on the 2014, while the local party boss’s power has been gradually decreased.

In Search of an Efficient Market Mechanism for a Digital Economy: Virtual Field Experiments on Posted-price Markets and Auctions

Beomsoo Kim(김범수) 한국전자거래학회 2000 한국전자거래학회지 Vol.5 No.1

k-means 클러스터링을 이용한 강판의 부식 이미지 모니터링

김범수(Beomsoo Kim),권재성(Jaesung Kwon),최성웅(Sungwoong Choi),노정필(Jungpil Noh),이경황(Kyunghwang Lee),양정현(Jeonghyeon Yang) 한국표면공학회 2021 한국표면공학회지 Vol.54 No.5

Corrosion of steel plate is common phenomenon which results in the gradual destruction caused by a wide variety of environments. Corrosion monitoring is the tracking of the degradation progress for a long period of time. Corrosion on steel plate appears as a discoloration and any irregularities on the surface. In this study, we developed a quantitative evaluation method of the rust formed on steel plate by using k-means clustering from the corroded area in a given image. The k-means clustering for automated corrosion detection was based on the GrabCut segmentation and Gaussian mixture model(GMM). Image color of the corroded surface at cut-edge area was analyzed quantitatively based on HSV(Hue, Saturation, Value) color space.