Price volatility in Niger millet markets
研究尼日尔小米市场沿营销链的价格波动传导，发现消费者与生产者价格之间存在重要的波动关联，且短期与长期价格动态存在显著差异。
Abstract Price volatility of food staples is one of the most complex factors affecting food security. Recent food price crises have raised academic interest in improved volatility assessment. The widely held assumption in econometric volatility models that long‐run volatility is constant, has been recently questioned and partly blamed for these crises. A multiplicative MGARCH model recently proposed by Bauwens et al. is used in this article to model price volatility transmission along the Niger millet marketing chain. Results suggest important volatility links between consumer and producer prices, as well as noteworthy differences between short and long‐run price dynamics.