Com respeito à teoria da produção, avalie a afirmativa:

Item 4 - Considere que para um baixo nível de utilização de um fator variável, seu produto marginal seja positivo e crescente. Se a partir de um certo ponto este fator apresentar produto marginal positivo e decrescente, então, a partir deste mesmo ponto, o produto médio do fator também será decrescente.

Seja v(z) a função que associa a cada !$ z \, \in \, R^2_+, !$ o valor máximo da função !$ f ,\ (\chi, \, y) \, = \, \chi y !$ na região !$ \{ (\chi, \, y) \, \in \, R^2_+ \, : \, 5 \chi \, + \, 3 \, y \, = \, z \}. !$ Avalie a afirmativa:

Item 3 - v é crescente.

Avalie a afirmativa:

Item 4 - g(x )= (1+b)x é uma assíntota da função f(x)= !$ { \large \sqrt{ \chi} \, + \, b \, \sqrt{ \chi \, - \, a} \over \chi^{-1} \, + \, \sqrt{ \chi}}. !$

Although a new system of fixed currencies would necessitate a degree of capital controls, there is no evidence that this would actually inhibit economic growth. In fact, the growth rates of Western nations have actually declined since the early 1970s. Providing currencies with fixed values would also obviate the need for derivatives, which could be allowed to wither on the vine without posing any further threat to the financial system.

European businesses are the keenest supporters of the European single currency project because it saves them the cost and uncertainty of hedging their trading operations in the derivatives markets. Investors in foreign countries might forgive capital controls and restrictions on the early withdrawal of investments if they had greater confidence that economic conditions in these countries would not be suddenly undermined by speculative currency attacks. A fixed currency system would also define the limits of speculation in the manner performed by the gold standard in the nineteenth century.

According to the text, the proposed system of fixed currencies

Item 4 - would increase the need for hedging trade operations.

The issue of speculation in emerging markets and the unfettered trade in foreign currencies is the most immediate and vexing problem faced by policymakers.

Politicians and central bankers worry about how to achieve economic stability without inhibiting the flexibility necessary for growth. Yet flows of speculative capital into fragile emerging markets have not brought any visible long-term benefits. Indeed, it can be argued that they have actually hindered the evolution of the liberal market system in many countries.

In this instance, speculation has been no friend of capitalism.

With respect to the issue of speculation in foreign currencies in emerging markets, the text makes it clear that

Item 2 - emerging markets can’t do without the inflow of capital;

Considere um mercado em concorrência perfeita, avalie a afirmativa:

Item 0 - A igualdade entre preço e custo marginal é condição necessária, mas não suficiente para a maximização dos lucros da firma.