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• Comparing parametric and semiparametric error correction models for estimation of long run equilibrium between exports and imports

  19-23

  Henry De-Graft Acquah

  Lawrence Acheampong

  Views:

  170

  This paper introduces the semiparametric error correction model for estimation of export-import relationship as an alternative to the least squares approach. The intent is to demonstrate how semiparametric error correction model can be used to estimate the relationship between Ghana’s export and import within the context of a generalized additive modelling (GAM) framework. The semiparametric results are compared to common parametric specification using the ordinary least squares regression. The results from the semiparametric and parametric error correction models (ECM) indicate that the error correction term and import variable are significant determinants of Ghana’s exports. On the basis of Akaike Information Criteria and Generalized Cross-Validation (GCV) scores, it is found that the semiparametric error correction model provides a better fit than the widely used parametric error correction model for modeling Ghana’s export-import relationship. The results of the analysis of variance provide further evidence of nonlinearity in Ghana’s export and import relationship. In effect, this paper demonstrates the usefulness of semiparametric error correction model in the estimation of export – import relationship.

  JEL code: C14, C18, C22, F10, F14

• Farm-retail price transmission in Malaysian pork sector

  87-92

  Tey (John) Yeong-Sheng

  Randy Stringer

  Wendy Umberger

  Views:

  177

  This study intends to determine the farm-retail price transmission behaviors of pork in Malaysia to serve as a good implication for pork pricing system in Malaysia. Using monthly data from January 1997 to December 2008, markup pricing model, Houck, and ECM approaches were estimated. While many previous studies found that farm-retail price transmission is asymmetric, this study encountered different result where the findings in both the Houck and ECM approaches suggested that the Malaysian pork farm-retail price transmission is symmetric. A change in farm price of pork is likely to have similar direction in change of retail price of pork in Malaysia. The pricing system of pork can therefore be further described by the estimated price transmission elasticities (that derived from the symmetric mark-up pricing model) where retail price is very sensitive to the changes in farm price. A change in farm price is expected to result in a bigger change in retail price of pork while other things remain unchanged.