That is the task i have to solve:

In claas we use the book: International Economics-Krugman, Obstfeld

a. What is the impact of the technical and sanitary measures on imports? (1 sentence) b. What does the other three coefficient means? (3 sentence) c. If you want to identify the impact of a free trade agreement between a group of countries (as a subset of J and I) in a given time throughout the trade periods. How would you reformulate the above gravity model? Rewrite the gravity specification. Only define the additional notations if necessary. d. Could you introduce inward and outward multilateral resistance term in the specified gravity model? (Hint: put a measure that can be utilised in the gravity application as discussed in the class). e. Add at least 4 additional explanatory variables commonly used in gravity model equations and identify the expected sign of their coefficients. Explain the reason for each sign in one sentence.3. The following gravity model is specied and very well suited to estimate the effect of technical and sanitary regulations on trade ows. The presented gravity model was this one: my! =exp[llnp +2hic +[33 1nd,}. +...+Zk;]+8f . it Where '3\" 1s the|1mports from exporter I to Importer J1 at time I ' p 1' and 3' present the annual meat 5 production and consumption quantities of exporter I and importer j , '3" is the bilateral distance between k 212-.\" exporter and importer, and k is the sum of the k different technical and sanitary measures, and the [3's represent the estimated coefcients. The following table presents the results of the estimation of the variable coefcients: Estimated coefficient of variable: Result In of exporter' s meat production 1.5 26 * * * In of importer's meat consumption 1.678 * * * In of distance -0.931*** Sum of technical/sanitaly measures 0.015 * * *