내구재 소비와 (S, s)모형: 가계패널자료 분석

홍기석,손은승 한국개발연구원 2005 KDI Journal of Economic Policy (KDI JEP) Vol.27 No.2

Using Korean household data, this paper examines how consumption of durable goods is determined. Previous studies report that the standard Permanent Income Hypothesis (PIH), while being broadly consistent with non-durable goods consumption, provides little explanation for durable goods consumption. In this paper, we consider the (S, s) model as an alternative to the standard PIH. The (S, s) model predicts that, because of fixed adjustment costs, consumers make no adjustment to the durable goods stock until deviation from the optimal level becomes large. When the adjustments are made, the durable goods stock attains the optimal level. In order to test this prediction, we examine the intra-temporal relationship between non-durable goods and durable goods consumption and intertemporal changes in durable goods consumption, using data from the Korean Household Panel Study. The results show that, while the standard PIH is rejected by the data, the (S, s) model is not. 본 논문은 우리나라 가계의 내구재 소비 결정에 관한 실증분석이다. 기존의 연구에 의하면 표준적인 항상소득가설은 비내구재 소비에 대해서는 비교적 높은 설명력을 나타내지만 내구재 소비에 대해서는 설명력이 거의 없는 것으로 나타난다. 본 연구에서는 이러한 항상소득가설의 대안으로서 조정비용의 존재를 허용하는 (S, s)모형을 고려한다. (S, s)모형에 의하면 내구재 소비는 조정비용 때문에 매 순간 최적 수준을 유지하지는 못하지만, 일단 조정이 이루어지는 경우에는 최적 수준을 달성할 것으로 예상된다. 본 논문은 (S, s)모형의 이러한 예측을 검증하기 위하여 한국가구 패널조사자료에 나타난 각 가계의 내구재 소비와 비내구재 소비의 관계 및 내구재 소비의 기간 간 변화를 살펴본다. 분석결과에 의하면 표준적인 항상소득가설은 기각되는 반면 (S, s)모형은 대체로 자료와 일치하는 것으로 나타난다.

연구논문 구연발표 : 임플랜트 식립 시 혈소판 농축혈장이 임플랜트 주위 골 재생에 미치는 영향

홍기석,임성빈,정진형 대한치주과학회 2004 대한치주과학회 학술대회자료집 Vol.2004 No.2

심포지움 연제 : 치조제 증대 수술을 통한 심미성회복

홍기석 대한치주과학회 2005 대한치주과학회 학술대회자료집 Vol.2005 No.2

연구논문 구연발표 : 임플란트 식립시 혈소판 농축혈장이 임플란트 주위 골결손부 재생에 미치는 영향

홍기석,임성빈,정진형,이종헌 대한치주과학회 2003 대한치주과학회 학술대회자료집 Vol.2003 No.2

혈소판 농축혈장이 임플랜트 주위 골결손부 재생에 미치는 영향

홍기석,임성빈,정진형,이종헌,Hong, Ki-Seok,Lim, Sung-Bin,Chung, Chin-Hyung,Lee, Chong-Heon 대한치주과학회 2003 Journal of Periodontal & Implant Science Vol.33 No.4

The current interest in periodontal tissue regeneration has lead to research in bone graft, root surface treatments, guided-tissue regeneration, and the administration of growth factors as possible means of regenerating lost periodontal tissue. Several studies have shown that a strong correlation between platelet-rich plasma and the stimulation of remodeling and remineralization of grafted bone exists, resulting in a possible increase of 15-30% in the density of bone trabeculae. The purpose of this study was to study the histopathological correlation between the use of platelet-rich plasma and a bone xenograft used in conjunction with a non-resorbable guided-tissue membrane, e-PTFE, compared to a control group with regards to bone regeneration at the implant fixture site. Implant fixtures were inserted and graft materials placed into the left femur of in the experimental group, while the control group received only implant fixtures. In the first experimental group, platelet-rich plasma and BBP xenograft were placed at the implant fixture site, and the second experimental group had platelet-rich plasma, BBP xenograft, and the e-PTFE membrane placed at the fixture site. The degree of bone regeneration adjacent to the implant fixture was observed and compared histopathologically at 2 , 4, and 8 weeks after implant fixture insertion. The results of the experiment are as follows: 1. The rate of osseointegration to the fixture threads was found to be greater in the first experimental group compared to the control group. 2. The histopathological findings of the second experimental group showed rapid resorption of BBP with subsequent new bone formation replacing the resorbed BBP. 3. The second experimental group showed new bone formation in the area adjacent to the fixture threads beginning two weeks after fixture implantation, with continued bone remodeling in the areas mesial and distal to the fixture. 4. Significant new bone formation and bone remodeling was observed in both experimental groups near the implant fixture sites. 5. The rate of osseointegration at the fixture threads was greater in the second experimental group compared to the first group, and the formation of new bone and trabeculae around the fixture site occurred after the fourth week in the second experimental group. The results of the experiment suggest that a greater degree of new bone formation and osseointegration can occur at the implant fixture site by utilizing platelet-rich plasma and bone xenografts, and that these effects can be accelerated and enhanced by concurrent use of a non-resorbable guided tissue membrane.

OTT를 통한 글로벌 콘텐츠 경험이 글로벌 지향성 및 글로벌 브랜드 태도에 미치는 영향

홍기석,김병조 국제문화기술진흥원 2023 문화기술의 융합 Vol.9 No.6

In recent years, the rapid proliferation of domestic and global Over-The-Top (OTT) platforms, in conjunction with the global pandemic, has substantially enhanced the accessibility of global contents. This trend is expected to continue to strengthen. This study examines the extent to which domestic consumers experience global contents through OTT platforms and its impact on individual consumers' global identity and the formation of global brand attitudes. We conducted an empirical analysis based on a survey of university students, who constitute the main consumer group for global contents through OTT platforms. The results show that as exposure to global content s and diversity of those experiences through OTT increase, respondents exhibit higher levels of global consumer orientation and global identity. This, in turn, has a positive influence on the formation of global brand attitudes.

성견 치조골 결손부에 자가골이식과 조직유도재생막을 이용한 치주치료시 치유효과에 관한 비교연구

홍기석,김종여,정진형,Hong, Ki-Seok,Kim, Jong-Yeo,Chung, Chin-Hyung 대한치주과학회 1994 Journal of Periodontal & Implant Science Vol.24 No.1

The goal of periodontal therapy is the regeneration of the periodontium lost by periodontal disease. The purpose of this study was to evaluate the regenerative potential of the autogenous bone graft and guided tissue regeneration in the treatment of periodontal bony defect in dogs. Experimental periodontitis were induced in the mandibular left 3rd premolar and right 3rd and 4th premolars of 5 dogs using orthodontic ligature wire. After 6 weeks, the ligature wire removed, surgical procedure were performed as follows. 1) control group : Flap operation(Mn.Lt 3rd premolar) 2) experimental group I : Flap operation + autogenous bone graft (Mn.Rt. 3rd premolar) 3) experimental group II : Flap operation + Gore-Tex membrane (Mn.Rt. 4th premoalr) Thereafter, dogs were sacrificed on the 1,2,4,8,16th week and the specimens were prepared and stained with hematoxyline-eosin stain for the light microscopic examination. The results of this study were as follows. 1. The apical migration of junctional epithelium was most remarkable in the flap operation and the experimental group II was less than the experimental group I. 2. In the formation of new alveolar bone, it was found in experimental group I,II and experimental group I is more than II. In the control group, few bone formation was found. 3. In the formation of new cementum, it was found in experimental group I,II and experimental group II is more than I. So, the periodontal therapy combined with autogenous and guided tissue regeneration will be produce the periodontal regeneration.

주택 소비와 습관형성 : 주관적 만족도 및 주택 소비 자료의 분석

홍기석 한국응용경제학회 2017 응용경제 Vol.19 No.1

본 연구는 비내구재 소비 대신 주택 소비를 대상으로 하여 습관형성(habit formation)의 실증적 증거를 살펴본다. 특히 한국노동패널의 주관적 만족도 자료를 이용하여 주택 소비가 개인의 만족도에 미치는 영향을 추정하고, 습관형성과 예상오류(projection bias)의 가능성을 고려한 이론적 모형에 근거하여 주택 소비와 비내구재 소비 간의 관계도 추정한다. 본 연구의 주요 분석결과는 다음과 같다. 첫째, 주택 소비의 경우 헤도닉적응(hedonic adaptation) 혹은 습관형성의 경향이 유의하게 관찰된다. 반면 비내구재 소비의 경우에는 유사한 결과가 관찰되지 않는다. 둘째, 소비자들이 습관형성의 정도를 과소평가할 경우에 존재할 것으로 예상되는 주택 소비와 비내구재 소비 간의 관계도 실제 자료에서 관찰된다. 셋째, 본 연구의 결과는 주택 소비에 관한 다른 가설 특히 조정비용 모형으로는 잘 설명되지 않는다. This paper reexamines empirical evidence on habit formation focusing on housing consumption. In particular, we use a household database to estimate the effect of housing consumption on subjective well-being and the relationship between housing and nondurables consumption implied by the theory. Main results are as follows. First, we find significant evidence of hedonic adaptation or habit formation for housing consumption, but not for nondurables consumption. Second, we find a relationship between housing and nondurables consumption that is consistent with a model of projection bias. Third, our results are not easily explained by alternative hypotheses including the non-convex adjustment cost model.

가계부채 관련 규제의 유효성 분석: 비은행 예금취급기관을 중심으로

홍기석 한국응용경제학회 2024 응용경제 Vol.26 No.3

본 연구의 목적은 가계부채 관련 규제가 실제로 금융기관의 대출에 유의한 영향을 미치는지를 분석하는 것이다. 특히 본 연구는 지역별로 부동산 시장의 상황에 따라 DTI / LTV 규제가 다르게 부과된 점에 착안하여, 지역별 규제 변수를 구축하고 시계열 자료 분석 대신 패널 자료 분석을 활용하였다. 또한 은행에 비해 리스크 발생 가능성이 높은 비은행 금융기관에 초점을 맞추었다. 지역별 대출 자료에 대한 분석에 의하면 DTI / LTV 규제가 은행의 가계대출에 미치는 효과는 뚜렷하지 않지만 비은행 예금취급기관에 대해서는 유의한 영향을 미치는 것으로 나타난다. 또한 개별 저축은행의 가계자금대출 자료를 이용한 분석에서도 개별 저축은행의 대출은 그 기관이 속한 영업권역의 DTI / LTV 규제에 의하여 영향을 받는 것으로 나타난다. This paper aims to examine the effectiveness of regulatory measures in controlling the amount of household loans provided by financial institutions. To achieve that, we construct regional panel data on DTI / LTV ratios for the period of 2017-2022, utilizing the regional variations in housing loan regulations introduced by the government’s designation of overheated speculative zones. Our empirical analysis at the regional level indicates that DTI / LTV regulations have significant negative effect on non-bank institutions’ household loan provision, but not on banks’. We also find a similar effect of the regulations at the micro level among individual savings banks.

지정토론

홍기석 한국금융연구원 2013 한국경제의 분석 Vol.19 No.2