O impacto dos gastos com publicidade nas vendas das firmas: avaliação empírica.
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This study aims to estimate an empirical model to relate spending on advertising revenues of firms, in order to serve as a tool for decision making, for it will study a case of telecommunications industry. The communication industry (advertising) in Brazil, according to IBGE 2008, is responsible for 4% of GDP, generating revenues of 57.5 billion dollars. With 113,000 businesses that generate 711,000 jobs, 866,000 people occupy and pay 5.9 billion in wages and taxes. However, most marketing managers say they do not have tools to measure the impact of their actions on the results of companies. The empirical model is estimated on the basis of monthly data for domestic long distance of Embratel for the period January 2009 to December 2011. The information often not available could only be used due to confidentiality undertaking. From cointegration techniques, we calculated the long-run elasticity of income over spending on advertising and price, so with their speed of adjustment to short-term deviations. The results suggest that revenue responds positively to changes in advertising spending, although the percentage is relatively low. Through the Dorfman-Steiner theorem we’re able to indicate that the optimum relationship between advertising spending and revenue would be approximately 20%, subjected to limitations of the model.