도로 객체의 특징선 기반 자율주행 차량 센서 자동 외부 보정

송원호,명현 제어로봇시스템학회 2022 제어로봇시스템학회 국내학술대회 논문집 Vol.2022 No.6

Oil Price and Total Factor Productivity of Korean Manufacturing Industries

송원호,박신욱 한국계량경제학회 2011 계량경제학보 Vol.22 No.4

This paper estimates the effects of oil price change on the productivity changes of Korean manufacturing industry. We applied a stochastic frontier production model to estimate the changes of total factor productivity. The model is estimated by the recently developed KSS panel data estimator (Kneip et al, 2012) which allows for arbitrary patterns of time-varying individual effects. We decompose the sources of total factor productivity (TFP) growth into technical progress, technical efficiency change, scale effects change and allocation efficiency change following Kumbhakar (2000). Empirical results based on data from 2001–2010 show that productivity growth was driven mainly by declining technical progress together with improving technical efficiency. Scale effects and allocation efficiency exert marginal impacts on TFP growth. For the derived TFP components, the impacts of oil price have been analyzed. The effects of oil price change were different across the sample period. When the oil price is low and moves smoothly during 2001-2006, only scale effects are marginally affected. When the oil price is high and fluctuated greatly during 2007-2010, however, all the components were significantly affected, thus technical progress and scale effects increased, and technical efficiency and allocation efficiency decreased.

IMPACTS OF OLYMPICS ON EXPORTS AND TOURISM

송원호 중앙대학교 경제연구소 2010 Journal of Economic Development Vol.35 No.4

There have been debates on the effects of Olympics on economy. Previous studies estimated the direct benefits and costs of Olympic Games, and concluded that the net effects were positive or negative depending on specific assumptions used for evaluations. Recent studies turn attentions to indirect benefits. For example, signaling model by Rose and Spiegel (2010) argues that mega events are the signals of liberalization the country sends, and that the hosting of mega events spurs exports. This paper more thoroughly estimates the effects of Summer Olympics on exports and tourism using the Rose and Spiegel’s data set extended up to 2008. Our empirical results show that the Summer Olympics have positively and significantly affected exports and tourists. The patterns are, however, different for exports and tourists. The effects on exports are slow and persist for long periods of time, whereas those on tourists are quick and short-lived. This finding is robust to different specifications. This result implies that, without carefully considering the time horizons of the effects of mega events, impact studies may be prone to over- or under-estimating the benefits of the mega events.

Testing for Unit Roots in Small Panels with Short-run and Long-run Cross-sectional Dependencies

송원호,장유순 WILEY-BLACKWELL PUBLISHING 2009 REVIEW OF ECONOMIC STUDIES Vol.76 No.3

가곡 한 바탕의 연행 효과에 대한 일고찰

송원호 우리문학회 1999 우리文學硏究 Vol.12 No.-

The Determinants of Convention Site Selection: An Experimental Analysis

송원호,한숙영 한국계량경제학회 2013 계량경제학보 Vol.24 No.4

This paper examines the determinants of convention site selection with experimental data. The meetings and conventions industry is becoming more competitive and gaining importance in a national economy. However, there are only a few studies available on this issue. Moreover, analytical tools used are limited to statistical variance analysis or simple linear regressions and they lacked theoretical backgrounds. This paper tries to fill this gap and examines the determinants of site selection and their relative importance in Korean meetings and conventions industry. We employ the random utility theory to investigate individual choice decisions and estimate the mixed logit model for the choices with different selection attributes. After careful examination of previous literature, fifteen candidate factors are finally chosen and the logit and the mixed logit models are estimated. Both methods show that meeting facilities, exhibition, access to site, reputation, local support and shopping are the most important factors.

가곡 한 바탕의 연행 효과에 대한 일고찰(2) : 안민영의 우조 한 바탕을 중심으로

송원호 안암어문학회 2000 어문논집 Vol.42 No.1

Building an Early Warning System for Crude Oil Price Using Neural Network

송원호 대외경제정책연구원 2010 East Asian Economic Review Vol.14 No.2

In this paper, a crisis index for the oil price shock is defined and a neural network model is specified for the prediction of the crisis index. This paper contributes to the literature in three ways. First, we build an early warning system for crude oil price. Although the oil price became one of the most important price index recently, no research efforts have been made to build an early warning system for crude oil price. Second, the neural network (NN) model is used to construct the early warning system. Most early warning systems are built based on the signaling approach. In this paper, we show that the neural network models are more flexible and have greater potential as EWS than the signaling approach. Third, we allow the multi-level crisis index. Previous models allowed only a zero/one crisis index whereas our model permits as many levels as possible. With this new model, we try to answer whether the oil price collapse following the historical peak in 2008 was predictable. We compare the results from the NN model with those from the ordered probit (OP) model, and show that the oil price crisis and the following crash were predictable by the NN model, but not by the OP model.

Finance and Economic Development in China

송원호,Yunjong Wang 대외경제정책연구원 2006 East Asian Economic Review Vol.10 No.1

This paper focuses on the following two issues. First, the paper investigates the extent to which financial development has contributed to economic growth in China. For this purpose, we utilize well-known financial development indicators and seek to find a long-run relationship between output growth and financial development. Second, the effects of financial repression on economic growth are examined. A financial repression index is constructed based on three related measures, and this index is augmented to the growth-finance equation. Empirical results show that, three financial development indicators, Liquid Liabilities, Domestic Credit and Non-Policy Loan, have stable positive long-run relationships with output growth. It is also found that output growth is weakly exogenous with respect to financial development, whereas financial development is not with respect to output growth. As for the financial repression, it turns out to have affected output growth negatively during the sample period. Unlike financial development indicators, financial repression index is found to be weakly exogenous. 본 논문은 다음의 두 가지 이슈에 대해 분석하였다. 첫째, 중국에서 금융발전이 경제성장에 기여하는 정도를 살펴보았다. 이를 위해 기존에 잘 알려진 금융발전지수를 사용하여 경제성장과 금융발전간의 장기적인 관계를 찾아보았다. 둘째, 금융억압이 경제성장에 미치는 영향을 살펴보았다. 세 가지 관련 지수를 종합하여 금융억압지수를 만들고 이를 추정식에 사용하였다. 추정에 사용된 세 가지 금융발전지수는 유동성 부채, 국내여신, 비정책금융여신을 GDP로 나눈 수치이며, 이 세 지수는 성장과 양의 장기적이고 안정적인 관계를 가졌다. 또한 성장은 금융발전에 대해서 약외생성을 가지는 반면 금융발전은 성장에 대해 약외생성을 가지지 않았다. 금융억압은 분석기간 동안 성장에 부정적인 영향을 미친 것으로 나타났다. 또한 금융발전지수와는 달리 금융억압지수는 약외생적인 것으로 나타났다.

Information Quality of Online Reviews in the Presence of Potentially Fake Reviews

송원호,박상곤,류두진 한국경제학회 2017 The Korean Economic Review Vol.33 No.1

Online reviews are important in the evaluation of product quality. This paper seeks to assess information quality of online reviews using the TripAdvisor data for Korean hotels. We first estimate the review model developed by Dai, Jin, Lee, and Luca (2012) and show that high-quality reviews contain most of the information for the quality of hotels. Second, we assess the degree of distortions caused by fake reviews through numerical experiments and show that the distortions of fake reviews are serious. Third, we compare the simple average and weighted average aggregation methods. Weighted average method is better than simple average in finding the quality of hotels but it is more vulnerable to fake reviews. Fourth, we suggest excluding low-quality reviews to deal with fake reviews and show that the benefit of avoiding serious distortions from potentially fake reviews is greater than the cost of losing information from low-quality reviews.