scholarly journals New nonlinear estimators of the gravity equation

2021 ◽  
Vol 95 ◽  
pp. 192-202
Author(s):  
Ayman Mnasri ◽  
Salem Nechi
2014 ◽  
Vol 32 (1) ◽  
pp. 30-70 ◽  
Author(s):  
Xiaohong Chen ◽  
David T. Jacho-Chávez ◽  
Oliver Linton

We establish the consistency and asymptotic normality for a class of estimators that are linear combinations of a set of$\sqrt n$-consistent nonlinear estimators whose cardinality increases with sample size. The method can be compared with the usual approaches of combining the moment conditions (GMM) and combining the instruments (IV), and achieves similar objectives of aggregating the available information. One advantage of aggregating the estimators rather than the moment conditions is that it yields robustness to certain types of parameter heterogeneity in the sense that it delivers consistent estimates of the mean effect in that case. We discuss the question of optimal weighting of the estimators.


2017 ◽  
Vol 62 (05) ◽  
pp. 1077-1095 ◽  
Author(s):  
JUNG HUR ◽  
HYUN-HOON LEE

The Asia–Pacific Economic Cooperation (APEC) forum, whose approach is voluntary and non-binding in open regionalism, has been criticized for its alleged failure to develop a rapid liberalization process and to contribute to a greater level of intra-regional trade in the APEC region. Nonetheless, we find that APEC has been contributing to intra-regional trade creation, particularly in trade in manufactured goods as compared to trade in non-manufactured goods. This finding is robust to the various fixed-effect models and the first-differencing models which are applied to the gravity equation.


2009 ◽  
pp. 105-121
Author(s):  
Alessandra Castellini ◽  
Cinzia Pisano

- Sector: some Results Since 1995, the Barcelona Process aims to establish a free trade area between Mediterranean countries by 2010. The most commercialized products from Mediterranean countries are fruit and vegetables. The agreement defines, only for some products, preferences at the entrance of the eu market, limited concession for each partner for single products, limited quantities and calendars. This work tries to analyse the impact of the liberalization on the Italian products applying a gravity model in order to asses the Italian import flows from eight Mediterranean countries which signed the Barcelona agreement. The econometric estimation includes fruit and vegetables at the aggregate level and some specified products that enter in competition with typical Italian Mediterranean production such as citrus, melons, potatoes and tomatoes. Since these Mediterranean countries appear as a highly heterogeneous block related to historical, cultural, political and geographical factors, the gravity equation controls these factors by an augmented gravity equation.JEL Code: Q17 - Agriculture in International TradeParole chiave: accordi euro-mediterranei, mercato italiano, ortofrutta, competitivitŕ, gravity model


2005 ◽  
Vol 112 (4) ◽  
pp. 322-333
Author(s):  
Sherman Stein
Keyword(s):  

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