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The outbreak of Severe Acute Respiratory Syndrome(SARS) has struck on tourism industry in South Korea. The purpose of this study is to assess the impact of the mysterious illness on visitors to South Korea. Authors research suggests a model for measuring the impact of SARS on South Korea's inbound demand during and immediately following the outbreak(March 2003 to July 2003). The forecasts, based on the seasonal autoregressive integrated moving average(SARIMA) model, are then compared with the actual volume of the visitors arrival. The empirical results indicate that during these affected months, South Korea's international tourism industry was hardly hit by the disease.핵심용어(Keywords):사스(SARS), 외생적 충격(external impact), 아리마 모형(ARIMA model), 계절 아리마 모형(seasonal RIMA model)