Everyone knows about seasonality. But what exactly do we know? This study systematically measures seasonal price gaps at 193 markets for 13 food commodities in seven African countries. It shows that the commonly used dummy variable or moving average deviation methods to estimate the seasonal gap can yield substantial upward bias. This can be partially circumvented using trigonometric and sawtooth models, which are more parsimonious. Among staple crops...
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ПОДРОБНАЯ ИНФОРМАЦИЯ
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2016/01/22
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Рабочий документ в рамках исследования вопросов политики
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WPS7539
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1
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1
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2016/01/22
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Disclosed
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Price seasonality in Africa : measurement and extent
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Poverty & Inequality