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The Balassa–Samuelson effect, also known as Harrod–Balassa–Samuelson effect (Kravis and Lipsey 1983), the Ricardo–Viner–Harrod–Balassa–Samuelson–Penn–Bhagwati effect (Samuelson 1994, p. 201), productivity biased purchasing power parity (PPP) (Officer 1976) and the rule of five eights (David 1972) is either of two related things: #The observation that consumer price levels in richer countries are systematically higher than in poorer ones (the "Penn effect"). #An economic model predicting the above, based on the assumption that productivity varies more by country in the traded goods' sectors than in other sectors (the Balassa–Samuelson hypothesis). This article deals with point (2): Balassa and Samuelson's causal model. For a fuller description of the fact it attempts to explain see: Penn effect. ==The theory== The Balassa–Samuelson effect depends on inter-country differences in the relative productivity of the tradable and non-tradable sectors. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Balassa–Samuelson effect」の詳細全文を読む スポンサード リンク
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