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交易費用係指一人世界唔會出現既費用範指一切可有助於交易而所用的費用如零售店租鋪既費用都係交易費用既一種所以1,2都係交易費用唔知有冇解錯....哈....
1. real GDP= nominal GDP* price undex in base year/ price index in current year即係最大分別就係...real gpd剩睇change on output/expenditure/income(睇你用咩approach啦) ignore price effect而nominal gdp就include埋price factor同output係入面所以睇gdp compare living standard既時候...real ...
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