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§Ú¦n¹³»¡±o»·¤F¡AÅý§Ú­Ì½Í½Í¤é±`¥Í¬¡¡C§Ú¬Û«H¤j®a³£¦³³o¼Ëªº¸gÅç¡G¿W¦Û¤@¤H¡AÀRÀRªº¦b®Ñ®à«e¬ã²ß¡C­WŪ¨}¤[¡Aºë¯«¤£¯à¦A¶°¤¤¡A©ó¬O¨M©w¥X¥~´²¤ß¡A§âÀ£¤O¼È®É©ñ¤U¡AÅý´²º©ªººë¯««ì´_¹L¨Ó¡C©ñ¤U¸£¤¤ªº¤j¥Û¡AÃhµÛ»´ÃPªº¤ß±¡¥|³B¶Ã³}¡A¤£ª¾¤£Ä±¸£¤¤¶Ç¨Ó¤F¤@­Ó«H¸¹¡A·Q­n¦YÂIªF¦è¡C©ó¬O¡A§A«K¨«¶i¤@©Ò¤p¦Y©±¡A¬Ý¬Ý¦³¬Æ»òªF¦è¦X¤ß¤ô¡C°£«D¤ß¤¤¤w¦­¦³¥Ø¼Ð¡A¥u¨Ï¬O¸Ó©±ªº¼ô«È¡A§A¤]¤£·|³s»ù¿úµP¤]¤£¬Ý«K¥I´Ú¡C¤@½ü«ä¦Ò«á¡A²×©ó§ä¨ì´X´Ú¦X²´½tªº´Ú¦¡¡AµL½×§A¬O¦p¦óªº¦³¿ú¡A§Aªº¨{¤lªº®e¶q¤]¥u¤¹³\§A¶R¤@´Ú¡C¤£¹L¡A³o¼Ëªº±¡ªp¤j®a¬O«ç¼Ë¥h¸Ñ¨M©O¡H§Ú¬O¤@­Ó¨S¦³¥D¨£ªº¤H¡A±`±`ªá¤ñ¸ûªøªº®É¶¡¤~¯à¤U¨M©w¡A³q±`§Ú¬O¬Ý¬Ý§O¤H¦h¶R¬Æ»ò«K¸ò¤W¥h¡C

¨ä¹ê¡A­è¤~§Ú©ÒÁ|ªº¶R¿}³o­Ó²³æªº¨Ò¤l¨ä¹ê¤w¸g¥]¬A¥»¨t¦CºtÁ¿ªº©Ò¦³½dÃ¥¡G·í§A·Q¶R¿}ªGªº®É­Ô¡A§Ú¬Û«H§A¤j¦h·|¥ý¯d·N»ù®æ¡A¤§«á·|¦A¦Ò¼{¤§«e¦³¨S¦³¦Y¹L³o´Ú¿}ªGªº¸gÅç¡A¤S©ÎªÌªB¤Í¦³»¡¹L³o´Ú¨ý¹D¤£¿ù¡K¡K¬ã¨s³o¨Ç·|¼vÅT§AÁʶR¨M©wªº¦]¯Àªº²z½×ºÙ¤§¬°»Ý¨D²z½×(Demand Theory)¡C

¾A¤~´£¨ì¿}ªGªº»ù®æ·|¼vÅT§AªºÁʶR¡A¨º»ò¿}ªG©±ªº»ù®æ¬O«ç¼Ë©wªº¤~¦n©O¡H³o«KÄÝ©ó¨Ñµ¹²z½×ªº¤@³¡¥÷(Supply Theory)¡C

¦³®É­Ô¡A§Ú­Ì¥i¯à·|µo²{¦³¨Ç¿}ªG¥Ã»·³£¨S¦³¤H¶R¡A¤S¦³¨Ç¸g±`¯Ê³f¡A¬°¦ó·|³o¼Ë¤l©O¡H¸g±`¦a¡A¬F©²·|¦³¤@¨Ç¬Fµ¦©M±¹¬I¨Ï±o§A©M¿}ªG©±ªº¥æ©ö¦³©Ò¼vÅT¡A¨Ò¦p¡A¬F©²©È¤pªB¤Í³E¤ú¡A³W©w¥¼º¡¤»·³ªº¨àµ£¤£¥i¥H¦Y¿}ªG¡A³o·|¹ï¿}ªG©±©M¤p«Ä¤l¦³¦ó¼vÅT¡H»ù®æ²z½×(Price Theory)«K±N»Ý¨D²z½×©M¨Ñµ¹²z½×¦X¨Ö¨Ó¸ÑÄÀ©M¬ã¨s³o¨Ç²{¶H¡C

¤j®aÁÙ°O±o³o­Ó¥@¬Éªº¸ê·½¦³­­¡A¦Ó¥X²{¦³µ}¤Ö©Êªº°ÝÃD¡A¾É­P¤j®a­n§@¥X¿ï¾Ü¡C¦P¼Ë¡A¿}ªG©±¥ç¦]¬°¸ê·½¦³­­¦Ó­n§@¥X¿ï¾Ü¡A­n¨M©w«ç¼Ë¥h¥Í²£¿}ªG·|¬O³Ì¦n¡HÀ³¸Ó¥Î¦h¨Ç¾÷±ñÁÙ¬O¦hÂI¤â¤u¡H¾Ç·|¤F¥Í²£²z½×(Theory of production)«K·|©ú¥Õºç¤¤¹D²z¡A©ú¥Õ¬°¦ó¬O¥Î¤H¦¬¿ú¤£¬O¥Î¾÷±ñ¡A¬O¥Î¾÷±ñ»s§@¿}ªG¦Ó¤£¬O¥Î¤H¤â¡C

§A¶R¿}ªGªº®É­Ô¥i¯à·|µo²{¦³¨Çªº¿}ªG·|¦³¤£¦Pªº»ù®æ¡A¬Æ¦Ü¦P¤@ºØ¿}ªG¦bµóÀYªº©M«Ñ¤fªº©±çE¤]¤£ºÉ¬Û¦P¡A¬°¦ó·|¦³³o¼Ëªº±¡ªp©O¡H¬°¦ó¤S¦³¨Ç¿}ªG¤£½×¦b¥ô¦ó©±çEªº»ù®æ·|¤@¼Ë©O¡H¦bÉ]³õµ²ºc(Market Structure)¤¤·|²`¤J±´°Q³o¨Ç°ÝÃD¡C

±q¥H¤Wªº°ÝÃD¡A¥i¥H©ú¥Õ¨ì°ò¥»¤W³£¬O¤@¨ÇÃö©ó¦p¦ó¿ï¾Üªº±¡ªp¡G­YµM¨S¦³¿ï¾Ü¡A«h¸gÀپǦb¨ºùب䣾A¥Î(Whenever there is choice, there is economics.)¡CÅ¢²Î¦a»¡¡A¸gÀپǴN¬O¿ï¾Ü²z½×(choice theory)¡C¤£¹L¡A¤j®a¤£­n¤Ö¬Ý¡u¿ï¾Ü¡v¤G¦r¡A¿ï¾Ü¬O¥Nªí¤F¤H¥@¶¡¤j³¡¥÷«Dª«²zªº²{¶H¡A¨Ã¤£¥u­­©ó°Ó·~¥@¬É¡A¨Ò¦p±B«Ã¡B¦Ò¸Õ¡Bªk«ß¡B³h´I®t¶Z¡B¾Ôª§¡B¬Fªvµ¥µ¥³£¥i¥Î¸gÀپǥh¸ÑÄÀ¡C

¬Û«H§Ú­è¤~©Ò»¡ªº¨Ò¤l¥O§A¹ï¸gÀپǦ³¤F¤j·§ªº»{ÃÑ¡A¦pªG§A¤£©ú¥Õªº¸Ü¤]¤£­nºò¡A­Y§A¹ï³o¨Ç°ÝÃD¦³¿³½ì¡A¥i¥H¦b¥H«áªº¤G¢Ì½Ò¤§¤¤´x´¤³o¨Ç·§©À¡C¦]¬°¤µ¤Ñ¬O²Ä¤@½Ò¡A©Ò¥H»¡¨ì³oùØ«K¯d«Ý¤U¤@½Ò¦A½Í¡A²{¦b¤j®a¥i¥H¤U½Ò¤F¡C


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¦b¤W¤@¸`¤¤¡A§ÚÁ|¥X¤F¶R¿}ªGªº­I«áÁôÂäF³\¦h¸gÀپǤWªº°ÝÃD¡A¦ý¬O¦b²Ó¤ßªº¬ã¨s°ÝÃD«K·|µo²{­n¿ï¾Ü¬O°ÝÃDªº®Ú¥»¡CÁÙ°O±o§Ú»¡¹L¡u¦³¿ï¾Ü´N¦³¸gÀپǡv¶Ü¡H¦]¬°¦pªG§Aªº¿ú¥]ªº¿ú¦h¨ì¼Æ¤£§¹¡AÅý§A¥i¥H§â©Ò¦³¿}ªG³£¤è«Kªº¶R¤U¨Ó±a¦^®a¤¤¡A§A«K¤£¦A¦³ª÷¿ú¤Wªº·Ð´o¡C¥i¬O§Ú­Ì¤j³¡¤À¥­¤Z¤Hªºª÷¿ú¦³­­¡A¿ï¾Ü³o­Ó°ÝÃD¬O¨C¤@¤Ñ³£­n­±¹ïªº¡C´Nºâ³o­Ó¥@¬Éªº¸ê·½µL­­¡A®É¶¡ÁÙ¬O¦³­­¡A¦b¥Ã¥Í¬ì§ÞÁÙ¨S¦³¥X²{¤§«e¡A¥ô¦ó¤H¡AµL½×¦p¦ó´I¶Q¡A³£­n­±¹ï®É¶¡¤À°tªº°ÝÃD¡A¤]´N¬O­n¦b²³¦h¿ï¾Ü¤¤§@¥X¨M©w¡C

¹ê»Ú¤W¡A­n§@¥X¨M©w´N¬O¦]¬°¸ê·½¯Ê¥Fªº°ÝÃD¡A¤]´N¬O¦b¸gÀپǤWºÙ¬°µ}¤Ö©Ê°ÝÃD(scarcity)¡C­è¤~»¡¹L¡A¦b¥Ã¥Í¬ì§ÞÁÙ¨S¦³µo©ú¤§«e¡A¤HÃþ¥Í©R¥²©w¨ü¨î©ó®É¶¡¡C¬Y­Óµ{«×¤W¡A¤HÄߩȦº¤`©M¤HÃþ´M§ä¥Í¦s·N¸q³£¬O¦]¬°¦b®É¶¡ªº¿ï¾Ü°ÝÃD¤W§x´b©Ò¥Íªº¡A¤£¤Ö©v±Ð³£·|´£¥X¤@­Ó²×·¥ªº¥@¬É¡A¦b¨ºùؤH±o¨ì¤F¥Ã¥Í¤£¦º¡A¦b¨ºùؤH³£·|¥Ã»·©¯ºÖ§Ö¼Ö¡A¦b¨ºùؤH¤£·|¦A§@¿ï¾Ü¡A¦b¨ºùظgÀپǤ]´N¨S¦³¥Î¤F¡C

¦^¨ì²{¹ê¡A®¤§ÚÅo­ö¡A­«½Æ»¡¤@¦¸¡A¥Ñ©ó®É¶¡¡Bª÷¿úµ¥¸ê·½³£¦³­­¡A§Ú­Ì¥²¶·§@¥X¿ï¾Ü¡A¤]´N¤Þ¥Ñ¤F¸gÀپǤ¤³Ì¬°°ò¥»ªº¤@­Ó·§©À¡G¡u¾÷·|¦¨¥»¡v(Opportunity cost)¡C¾÷·|¦¨¥»´N¬O§@¥X¿ï¾Ü©Ò?¬¹ªº¨Æª«¡A¾ã®M¸gÀپǴN¬O¤Ï½Æ¦a¹B¥Î¾÷·|¦¨¥»³o­Ó·§©À¡A©Ò¥H¸gÀپǴN¬O¦b¬ã¨s«ç¼Ë¦b³o­Ó¦³­­ªº±¡ªp¤§¤U§@¥X¦³²z©Êªº¨M©w¡C

¤j³¡¥÷±Ð¾Ç®Ñ·|±N¾÷·|¦¨¥»©w¸q¬°¡u¦b©ñ±óªº¾÷·|¤¤¡A»ù­ÈªÌ³Ì°ªªÌ¬°¾÷·|¦¨¥»¡v¡C(Opportunity is highest-valued option forgone)³o­Ó©w¸q¬Ý¨Ó¥i¯à¥O¤HºN¤£µÛÀY¸£¡A§Ú²Ä¤@¦¸¬Ý¥ç·P¨ì¢Ì¤ÀºÃ´b¡A¦Ñ¬O·Q¤F¦n´X¤Ñ¤´¬OµL©Ò±o¡A¦ý¬O«á¨Óµo²{¥u­n¤p¤ß¬Ýªº¸Ü«K¤£¤Ó§xÃø¤F¡A¦]¬°¾÷·|¦¨¥»¬O¥Nªí¯u¥¿ªº¦¨¥»¡C

­n©ú¥Õ¾÷·|¦¨¥»¡A´N¥²¶·¯d·N¨âÂI¡C²Ä¤@¬O¾÷·|¤G¦r¡C¾÷·|¡AÅU¦W«ä¸q¡A´N¬O«ü§A¦³¿ï¾Ü¡C´«¥y¸Ü»¡¡A·í§A¨S¦³¿ï¾Üªº®É­Ô«K¨S¦³¦¨¥»¡A¦]¬°§A¨S¦³ªF¦è©ñ±ó¥ô¦óªF¦è¡C(When there is no choice, there is no opportunity cost.)¬°¦ó¦³¾÷·|´N¦³¦¨¥»¡H¦]¬°§A©ñ±ó¤FªºªF¦è¡C

Ä´¦p»¡¦b¶R¿}ªº¨Ò¤l¤¤¡A³q±`ªº¿ìªk«K¥u¦³¿ï¾Ü³Ì³ß·Rªº¡A°ß¦³¶R¦Û¤v³Ì·Q­nªº¤@´Ú¡A©ñ±ó¥t¤@´Úªº¿}ªG¡C©ñ±óªº¶R¥t¤@´Ú¿}ªº¾÷·|´N¬O§A©ñ±óªº¨Æ±¡¡C

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§A¥i¯à·|°Ý¬°¦ó¸gÀپǮa­nµo©ú¤@­Ó¦p¦¹¯S§Oªº¦Wµü¡A§Ú¦b¦^µª«e¥ý¤j®a¥ý·Q¤@·Q¡C¨ä¹ê¡A¾÷·|¦¨¥»³o­Ó±M¥Î¦Wµü¬O¥Î§@»P§Ú­Ì¥­±`¥Î©ÎªÌ·|­p¥Îªº¦¨¥»ªº·§©À¦b°Ï¤À¤§¥Î¡C·|­p¥Îªº¦¨¥»¥u¬Oª÷¿ú¤Wªº¦¨¥»¡A¦ý¬O¾÷·|¦¨¥»¬Û¹ï©ó¦¨¥»¨Ó»¡¡A¬O§ó¬°¨ãÅé¡A¦Ò¼{§ó¬°¥þ­±¡AÅU¤Î¦U¤è­±ªº¥N»ù¡A¥ç§Y¬O¯u¥¿ªº¦¨¥»¡C(Opportunity cost is a real cost. It counts all aspect of cost.)

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