Local polynomial fitting and spatial price relationships: price transmission in EU pork markets
研究了1993年欧盟统一市场后猪肉市场的价格传导过程，比较了非参数回归与非线性阈值模型的结果，发现价格传导存在且不对称，非参数方法显示更高的传导程度。
We study price transmission processes within EU pork markets after the implementation of the EU single market in 1993. We compare results derived from non-parametric regressions with those obtained using alternative non-linear threshold models. Both techniques support the hypothesis that prices are transmitted across spatially separate EU pig markets and provide evidence for asymmetric price adjustments. They also suggest the existence of a range of price differentials where equilibrating price adjustments are less intense. Non-parametric techniques often suggest a higher degree of price transmission than that implied by threshold models. Copyright 2006, Oxford University Press.