Duba zuwa sashi a kasa, sa'an nan kuma amsa tambaya daga baya a cikin wannan harshe kamar yadda sashi: Passage: Idan wani masana'antu yana amfani da kadan daga wani factor na samar, a kananan karuwa a samar da cewa masana'antu ba zai ba da tayin farashin cewa factor up. To a farko domin kimantawa, kamfanoni a cikin masana'antu za su fuskanci m halin kaka, da kuma masana'antu samar da masu lankwasa ba zai slope sama. Idan wani masana'antu yana amfani da wani m adadin cewa factor na samar, a karuwa a samar da cewa masana'antu za su nuna kara halin kaka. Amma irin wannan factor ne wata ila za a yi amfani da a maye gurbin da masana'antu ta samfurin, da kuma wani ya karu farashin cewa factor zai yi effects a kan samar da wadanda maye gurbin. Saboda haka, Sraffa jãyayya, na farko domin effects na wani canji a cikin bukatar kwana na asali masana'antu a karkashin wadannan zaton sun hada da wani canji a cikin kwana na maye gurbin da masana'antu ta samar, da kuma sakamakon shigewar a cikin asali masana'antu ta samarwa kwana.
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