Çѱ¹°æÁ¦Çк¸ Á¦ 27±Ç, Á¦ 1È£ (2020³â º½)

    Signaling, Prior-bias and Welfare Implications
    Eunjee Joo, Yong-Ju Lee
    Pages 3-22
  • Abstract ( Eng | Kor ) || PDF
    • Signaling, Prior-bias and Welfare Implications
      Eunjee Joo, Yong-Ju Lee


         Although most economics and social science textbooks describe Bayes¡¯ rule as the basic principle of probabilistic inference combining prior information with additional information from new observations, it is widely observed in the laboratory experiments that people¡¯s information processing systemically deviates from Bayes¡¯ rule. Here we illustrate how receiver¡¯s prior-biasedness affects players¡¯ strategic incentives and welfare implications in the ¡°costless¡± and ¡°costly¡± models of signaling. From these examples we draw an interesting welfare implication that the receiver¡¯s prior-bias may work as a welfare-enhancing device even in the costly signaling environments. That is, contrary to the widespread beliefs that non-Bayesian inference is a sign of human irrationality and a social cost, we show that a behavioral bias can be beneficial.
    •    °æÁ¦ÇÐÀ» Æ÷ÇÔÇؼ­ ´ëºÎºÐÀÇ »çȸ°úÇÐ ±³°ú¼­¿¡¼­ º£ÀÌÁî ±ÔÄ¢(Bayes¡¯ rule)À» »çÀüÀû Á¤º¸¿Í Ãß°¡Àû Á¤º¸¸¦ °áÇÕÇÏ´Â È®·üÀû Ãß·ÐÀÇ ±âº»¿ø¸®·Î ¼³¸íÇÏ°í ÀÖÁö¸¸, ±¤¹üÀ§ÇÑ ½ÇÇ迬±¸µéÀº »ç¶÷µéÀÇ Á¤º¸Ã³¸® °úÁ¤Àº º£ÀÌÁî ±ÔÄ¢¿¡¼­ ü°èÀûÀ¸·Î ¹þ¾î³ª ÀÖÀ½À» È®ÀÎÇØÁÖ°í ÀÖ´Ù. º» ³í¹®Àº ½ÅÈ£¸ðÇü¿¡ ¼­ ¼ö½ÅÀÚÀÇ »çÀüÀû ½Å³ä(prior beliefs)¿¡ ´ëÇÑ ÆíÇâÀÌ °æ±âÀÚµéÀÇ Àü·«Àû Àμ¾Æ¼ºê¿Í ÈÄ»ýÀû ÇÔÀÇ¿¡ ¾î¶² ¿µÇâÀ» ¹ÌÄ¡´ÂÁö ¼³¸íÇÑ´Ù. º» ³í¹®Àº º¸ÆíÈ­ µÈ ¿¹Á¦µéÀ» ÅëÇØ ºñ¿ëÀÌ µå´Â ½ÅÈ£ ȯ°æ¿¡¼­ ¼ö½ÅÀÚÀÇ »çÀüÀû ½Å³ä¿¡ ´ëÇÑ ÆíÇâÀÌ °æ±âÀڵ鿡°Ô ÈÄ»ýÁõÁø È¿°ú¸¦ °¡Á®¿Ã ¼ö ÀÖÀ½À» º¸ÀδÙ. Áï, º£ÀÌÁö ¾ð Ã߷п¡¼­ ¹þ¾î³ª´Â °ÍÀÌ Àΰ£ÀÇ ºñÇÕ¸®¼ºÀ» µå·¯³»´Â °ÍÀÌ°í »çȸÀû ºñ¿ë À̶ó´Â ÀϹÝÀûÀÎ ¹ÏÀ½°ú ´Þ¸®, ÀÌ·¯ÇÑ ÇàÅÂÀûÀÎ ÆíÇâÀÌ È¿¿ëÃø¸é¿¡¼­ ÀÌ·Î¿î °ÍÀÌ µÉ ¼ö ÀÖÀ½À» º¸ÀδÙ.
    ¿ì¸®³ª¶ó Àü·Â½Ã½ºÅÛ¿¡ ´ëÇÑ Å¾籤¹ßÀü È®´ëÀÇ ¿µÇâ°ú ´ëÀÀ¹æ¾È : °èÅë ¹× ¼ö±Þ¾ÈÁ¤¼ºÀ» Áß½ÉÀ¸·Î
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    Pages 23-65
  • Abstract ( Eng | Kor ) || PDF
    • Impact of Photovoltaic Generation Expansion on Korea's Electricity Power System and the Solutions: Focusing on Power System Stability and Supply-and-demand Stability
      Wan-soo Kim, Ha-Hyun Jo


         To achieve the GHG reduction target, various eco-friendly policies are implemented by countries. The expansion of renewable energy is one of the most important policies in many countries including Korea. In order to cope with the unstable supply and demand and the system unstable due to the photovoltaic generation, it is necessary to consider securing flexible resources, discovering artificial inertia, and securing auxiliary services. Also, the introduction of a multi-layered trading system, the reduction of transaction time-units, the separating the reserve market from the energy market, and the granting the solar self-responsibility obligation should be concerned as a solution.
    •    Àü ¼¼°èÀûÀÎ ¿Â½Ç°¡½º °¨Ãà¸ñÇ¥¸¦ ´Þ¼ºÇϱâ À§ÇÏ¿© ±¹°¡º°·Î ´Ù¾çÇÑ Ä£È¯ °æ Á¤Ã¥À» ¼öÇàÇÏ°í ÀÖ´Ù. ÀÌ·¯ÇÑ Ä£È¯°æÁ¤Ã¥ Áß Àç»ý¿¡³ÊÁö º¸±ÞÀº ¿ì¸® ³ª¶ó¸¦ ºñ·ÔÇÑ ¸¹Àº ³ª¶ó¿¡¼­ °¡Àå Áß¿äÇÑ Á¤Ã¥ Áß ÇϳªÀ̸ç, ±¹°¡º°·Î Àç »ý¿¡³ÊÁö º¸±ÞÀ» À§ÇÏ¿© FIT¿Í RPS µîÀ» Áö¿øÁ¤Ã¥À¸·Î ¼öÇàÇÏ°í ÀÖ´Ù. ÃÖ±Ù ¿ì¸®³ª¶ó´Â 2034³â ÃÑ ¹ßÀü¼³ºñ Áß 40%¸¦ Àç»ý¿¡³ÊÁö·Î °èȹµÇ°í ÀÖÀ¸¸ç, ´Ù¾çÇÑ Áö¿øÁ¤Ã¥À¸·Î Àç»ý¿¡³ÊÁö ±Ô¸ðµµ ºü¸£°Ô Áõ°¡ÇÏ°í ÀÖ´Ù. Àç »ý¿¡³ÊÁö Áß Å¾籤¹ßÀüÀº Àϻ翡³ÊÁö º¯È­¿¡ µû¶ó Ãâ·ÂÀÌ º¯µ¿ÇÏ¿© ³·½Ã °£´ë duck curve Çö»óÀ» À¯¹ßÇÏ°í ÀÖ´Ù. ÀÌ·¯ÇÑ Å¾籤¹ßÀüÀ¸·Î ÀÎÇÑ Àü·Â½Ã½ºÅÛÀÇ ¼ö±ÞºÒ¾ÈÁ¤°ú °èÅëºÒ¾ÈÁ¤¿¡ ´ëÀÀÇϱâ À§ÇÏ¿© À¯¿¬¼ºÀÚ¿øÀÇ È®º¸ ¹× Àΰø°ü¼º°ú º¸Á¶¼­ºñ½º È®º¸ µîÀÌ ÇÊ¿äÇϸç, ÇÏ·çÀü-´çÀÏ-½Ç½Ã°£ À¸·Î À̾îÁö´Â ´ÙÁß°Å·¡Ã¼Á¦ µµÀÔ°ú ¼ÓÀÀ¼ºÀÚ¿ø À¯µµ¸¦ À§ÇÑ °Å·¡´ÜÀ§ÀÇ Ãà¼Ò, ¿¡³ÊÁö½ÃÀå°ú ¿¹ºñ·Â½ÃÀåÀÇ ±¸ºÐ, ž籤ÀÇ ÀÚ±âÃ¥ÀÓÀǹ« ºÎ¿© µîÀÌ ÇÊ¿äÇÏ´Ù.


The Korean Journal of Economics, Vol. 27, No. 1 (Spring 2020)