This master thesis deals with the origin of goods which is one of the key concepts in international trade. The origin of goods signifies the country where were acquired and processed. The country of origin is defined by the rules of origin and then it could be preferential or non-preferential. The first aim of this work is to explain correct proof and determination of the origin of goods, especially the emphasis is put on preferential origin of goods in the EU. The cumulation of goods is an important part of this thesis that plays the role by the producer's decision from where certain materials would be imported. The entry of the Czech Republic to the European Union stood for the acceptance of the common trade policy but also the Czech customs administration and customs policy as a whole were transformed. The final part of the work is dedicated to their competences and responsibilities.

El presente trabajo de investigación tiene como propósito determinar y analizar los factores que influyeron en las exportaciones peruanas de alimentos para animales de la industria acuícola con destino a Ecuador dentro del marco de la CAN entre los años 2010 al 2019. Para establecer ello, se ha determinado la selección de tres variables a estudiar con el fin de procurar responder si las normas de origen, la creación de comercio y las medidas sanitarias y fitosanitarias, todas ligadas a la relación entre Perú y la Comunidad Andina en términos comerciales sobresaliendo las preferencias arancelarias del producto elegido en dirección a Ecuador y los protocolos sanitarios aplicados, han estimulado un mayor intercambio comercial entre los dos países en los periodos considerados anteriormente. Del mismo modo, también se ha precisado la evaluación de organizaciones involucradas que afectan el nivel y el desarrollo de las exportaciones peruanas con destino a Ecuador. Para la presente investigación, la información recopilada se obtuvo de distintas fuentes como SUNAT, SIICEX y Trademap que posibilitaron el acceso a las estadísticas de exportaciones de la partida mostrando, de igual manera, a las empresas que las componen con sus respectivos registros. Sumado a ello, a través de distintas entrevistas con los actores primordiales implicados se logró obtener mayor información, conocimiento y apreciación en relación a los factores propuestos en esta investigación. En virtud de lo cual, todos los datos recolectados se analizarán bajo el Software SPSS Statistics v. 25 y Atlas.ti 8. / The purpose of this research work is to determine and analyze the factors that influenced Peruvian exports of animal feed from the aquaculture industry to Ecuador within the framework of the CAN between the years 2010 to 2019. To establish this, the selection of three variables to study has been determined in order to try to answer whether the rules of origin, the creation of trade and sanitary and phytosanitary measures, all linked to the relationship between Peru and the Andean Community in trade terms, highlighting the tariff preferences of the chosen product to Ecuador and the certifications obtained, have stimulated greater trade between the two countries in the periods considered above. In the same way, the evaluation of organizations involved that affect the level and development of Peruvian exports to Ecuador has also been specified. For the present investigation, the information collected was obtained from different sources such as SUNAT, SIICEX and Trademap, which made it possible to access the tariff heading's export statistics showing, in the same way, the companies that compose them with their respective records. Added to that, through different interviews with the main actors involved, it was possible to obtain more information, knowledge and appreciation in relation to the factors proposed in this research. By virtue of it, all the collected data will be analyzed under the SPSS Statistics v. 25 and Atlas.ti 8 Software. / Tesis