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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

A previsão da demanda automotiva brasileira de longo prazo baseada em modelos econométricos univariados

Davies Junior, Christopher 18 August 2011 (has links)
Submitted by Christopher Davies Junior (christopher.junior@volkswagen.com.br) on 2011-09-05T20:59:11Z No. of bitstreams: 1 Utilizando modelos econométricos univariados.pdf: 443280 bytes, checksum: c9deb332599852aebed4578c3453998c (MD5) / Approved for entry into archive by Gisele Isaura Hannickel (gisele.hannickel@fgv.br) on 2011-09-06T12:24:10Z (GMT) No. of bitstreams: 1 Utilizando modelos econométricos univariados.pdf: 443280 bytes, checksum: c9deb332599852aebed4578c3453998c (MD5) / Approved for entry into archive by Gisele Isaura Hannickel (gisele.hannickel@fgv.br) on 2011-09-06T12:24:21Z (GMT) No. of bitstreams: 1 Utilizando modelos econométricos univariados.pdf: 443280 bytes, checksum: c9deb332599852aebed4578c3453998c (MD5) / Made available in DSpace on 2011-09-06T12:29:13Z (GMT). No. of bitstreams: 1 Utilizando modelos econométricos univariados.pdf: 443280 bytes, checksum: c9deb332599852aebed4578c3453998c (MD5) Previous issue date: 2011-08-18 / A previsão de demanda é uma atividade relevante pois influencia na tomada de decisão das organizações públicas e privadas. Este trabalho procura identificar modelos econométricos que apresentem bom poder preditivo para a demanda automotiva brasileira num horizonte de longo prazo, cinco anos, através do uso das séries de vendas mensais de automóveis, veículos comerciais leves e total, o período amostral é de 1970 a 2010. Foram estimados e avaliados os seguintes modelos: Auto-regressivo (Box-Jenkins, 1976), Estrutural (Harvey, 1989) e Mudança de Regime (Hamilton, 1994), incluindo efeitos calendário e dummies além dos testes de raízes unitárias sazonais e não-sazonais para as séries. A definição da acurácia dos modelos baseou-se no Erro Quadrático Médio (EQM) dos resultados apresentados na simulação da previsão de demanda dos últimos quinze anos (1995 a 2010). / Demand forecasting is an important activity because it influences the decision making of public and private organizations. This study identifies econometrics models that have good predictive power for the Brazilian automotive demand in a long-term horizon, five years, through the use of series of monthly sales of automobiles, light commercial vehicles and total, the sample period is from 1970 until 2010. Were estimated and evaluated the following models: Auto-regressive (Box-Jenkins, 1976), Structural (Harvey, 1989) and Regime Change (Hamilton, 1994), including calendar effects and dummies, also seasonal and non-seasonal unit root tests for the series. The definition of the accuracy of the models was based on Mean Square Error (MSE) of the results presented in the simulation of the forecast demand over the last fifteen years (1995 till 2010).

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