In this paper we use the conditional Value at Risk (CoVaR) and CoVaR variation (ΔCoVaR) proposed by Adrian and Brunnermeier (2008, 2011, 2016) to estimate the Peruvian stock market risk (through the IGBVL) conditioned on the international financial market (given that the S&P500) and conditioned on three of the main commodities exported by Peru: copper, silver and gold. Moreover, the CoVaR measures are compared with the VaR of the IGBVL to understand the differences using conditional and unconditional risk measure estimators. The results show that both CoVaR and ΔCoVaR are useful indicators to measure the Peruvian stock market risk. / En este trabajo utilizamos el Valor en Riesgo condicional (CoVaR) y la variación CoVaR (ΔCoVaR) propuestos por Adrian and Brunnermeier (2008, 2011, 2016) para estimar el riesgo bursátil peruano (a través del IGBVL) condicionado en el mercado internacional (dado por el índice S&P500) y condicionado en tres de los principales comodities exportados por el Perú: cobre, plata y oro. Además, las medidas CoVaR son comparadas con el VaR del IGBVL para entender las diferencias al utilizar medidas de riesgo condicionales e incondicionales. Los resultados muestran que ambas medidas CoVaR and ΔCoVaR constituyen indicadores útiles para estimar el riesgo bursátil peruano.

The process of strategy purchasing management in multinational companies is described and analysed in this master´s thesis. Both methodology and strategy of purchasing management in the multainational companies have been compiled in this work by means of theoretical knowledge from literature and according to the analysis of the current state of purchasing management in a company.

[pt] Esta tese é composta por 3 capítulos. No primeiro capítulo mostro que quando um banco central não é totalmente apoiado financeiramente pelo tesouro e enfrenta uma restrição de solvência, um aumento no tamanho ou uma mudança na composição de seu balanço pode servir como um mecanismo de compromisso em um cenário de armadilha de liquidez. Em particular, quando a taxa de juros de curto prazo está em zero, operações de mercado aberto do banco central que envolvam compras de títulos de longo prazo podem ajudar a mitigar a deflação e recessão sob um equilíbrio de política discricionária. Usando um modelo simples com produto exógeno, mostramos que uma mudança no balanço do banco central, que aumenta seu tamanho e duração, incentiva o banco central a manter as taxas de juros baixas no futuro, a fim de evitar perdas e satisfazer a restrição de solvência, aproximando-se de sua política ótima de commitment. No segundo capítulo da tese, eu testo a validade do novo mecanismo desenvolvido no capítulo 1, incorporando um banco central financeiramente independente em um modelo DSGE de média escala baseado em Smets e Wouters (2007), e calibrando-o para replicar principais características da expansão do tamanho e composição do balanço do Federal Reserve no período pós-2008. Eu observo que os programas QE 2 e 3 geraram efeitos positivos na dinâmica da inflação, mas impacto modesto no hiato do produto. O terceiro capítulo da tese avalia as consequências em termos de bem-estar de regras fiscais simples em um modelo de um pequeno país exportador de commodities com uma parcela da população sem acesso ao mercado financeiro, onde a política fiscal assume a forma de transferências. Uma constatação principal é que as regras orçamentárias equilibradas para as receitas de commodities geralmente superam as regras fiscais mais sofisticadas, em que as receitas de commodities são salvas em um Fundo de Riqueza Soberana. Como os choques nos preços das commodities são tipicamente altamente persistentes, a renda atual das famílias está próxima de sua renda permanente, tornando as regras orçamentárias equilibradas próximas do ideal. / [en] This thesis is composed of 3 chapters. In the first chapter, It s shown that when a central bank is not fully financially backed by the treasury and faces a solvency constraint, an increase in the size or a change in the composition of its balance sheet (quantitative easing - QE) can serve as a commitment device in a liquidity trap scenario. In particular, when the short-term interest rate is at the zero lower bound, open market operations by the central bank that involve purchases of long-term bonds can help mitigate deflation and recession under a discretionary policy equilibrium. Using a simple endowment-economy model, it s shown that a change in the central bank balance sheet, which increases its size and duration, provides an incentive to the central bank to keep interest rates low in the future to avoid losses and satisfy its solvency constraints, approximating its full commitment policy. In the second chapter, the validity of the novel mechanism developed in chapter 1 is tested by incorporating a financiallyindependent central bank into a medium-scale DSGE model based on Smets and Wouters (2007), and calibrating it to replicate key features of the expansion of size and composition of the Federal Reserve s balance sheet in the post-2008 period. I find that the programs QE 2 and 3 generated positive effects on the dynamics of inflation, but mild effects on the output gap. The third chapter of the thesis evaluates the welfare consequences of simple fiscal rules in a model of a small commodity-exporting country with a share of financially constrained households, where fiscal policy takes the form of transfers. The main finding is that balanced budget rules for commodity revenues often outperform more sophisticated fiscal rules where commodity revenues are saved in a Sovereign Wealth Fund. Because commodity price shocks are typically highly persistent, the households current income is close to their permanent income, so commodity price shocks don t need smoothing, making simple balanced budget rules close to optimal.

The goal of this dissertation is to consider the practicity of grant for a company, which has its business line in ecological disposal of car wrecks and electric scraps. Then to describe the significancy of line of business for the company especially with the relations of impacts to the environment. Practical part is devoted to evaluation and analysis of company which is interested in acceptance of grant from the State fond for environment (SFŽP) for the development of its business activities. After this study I concur with the analysis of other actual possible forms of state assistance. They could lead to an improvement of position and no only of this concrete company, but also the others which are active in this business line of ecological disposal of car wrecks end electric scraps.