This study was performed by canonical correlation analysis (CCA) for prediction of relationship between supply and demand factors of pork in South Korea. The canonical correlations between the supply and demand factors were 0.996 for the first canonical pair (p<0.01). Beginning stocks of domestic pork (BSDP) and production of domestic pork (PDP) provided high contribution to form the first fair of demand factors ( 1 ), whereas ending stocks of domestic pork (ESDP), consumption of domestic pork (CDP), population with age 15 and above (PA15A), and population of employment (PE) highly contributed to the first fair of supply factors ( 1 ). In addition, BSDP, ESDP, PDP and CDP have a strong predictive powers for the changes of the pork market. Therefore, it is suggested that the results of CCA are able to establish a strategy for stabilizing pork market by the appropriate modification or control of the related factors to domestic pork supply based on the domestic pork demand.

This study was done to induce efficiently environmental management of piggery via an empirical analysis how much a variety of environmental factors give influence on marketed pig per sow per year (MSY) in production of pig. 30 Pig farms were surveyed for analyses of pig rearing environmental factors, productivity index, and income index. The collected data were examined for influenceon MSY owing to these factors via a multipleregression model.According to results of model estimation, if mortality rate of pigs increased 1%, MSY reduced 0.18 heads, whereasif a number of sows increased 1 head, MSY reduced rather 0.007 heads. When the marketing day and estrus interval delayed and increased 1 day,MSY reduced 0.095 and 0.534 heads, respectively.Therefore, in order to improve MSY, entrepreneur to manage a piggery is a critically important to reduce mortality rate via decrease of harmful gas in piggery.

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