Small victories and bigger defeats

The coming into force of the UN's Kyoto protocol on climate change might seem a victory for Europe's greens, but it actually masks a larger failure. The most promising aspect of the treaty—its innovative use of market-based instruments such as carbon-emissions trading—was resisted tooth and nail by Europe's greens. With courageous exceptions, American green groups also remain deeply suspicious of market forces.

If environmental groups continue to reject pragmatic solutions and instead drift toward Utopian (or dystopian) visions of the future, they will lose the battle of ideas. And that would be a pity, for the world would benefit from having a thoughtful green movement. It would also be ironic, because far-reaching advances are already under way in the management of the world's natural resources—changes that add up to a different kind of green revolution. This could yet save the greens (as well as doing the planet a world of good).

According to the text, the coming into force of the UN’s Kyoto protocol on climate change

Item 0 was a failure,

A queda drástica do preço do café à época da Grande Depressão levou o governo brasileiro a implementar uma política de defesa do setor cafeeiro. Segundo Celso Furtado,

Item 0 essa política pode ser vista, pelos resultados que produziu, como uma política anticíclica consoante os fundamentos macroeconômicos que, alguns anos depois, seriam preconizados por Keynes;

Julgue a afirmativa. A respeito dos estimadores de Mínimos Quadrados Ordinários (MQO), em um modelo de regressão linear múltipla:

Item 1 Se E(ε) ≠ 0, os estimadores de todos os parâmetros, com exceção do intercepto, serão viesados.

Avalie a proposição:

Item 2 Se um país tem superávit no balanço de pagamentos, suas exportações líquidas serão positivas.

Julgue a afirmativa. Em uma função densidade de probabilidade conjunta f(x,y), para as variáveis aleatórias contínuas X e Y:

Item 4 Se X e Y são independentes, VY[E(X | y ) ] = V[X],

The concept of fundamental or “intrinsic” value was also understood by players in the early stock market, although misleading prospectuses, the manipulation of share prices, and the stock market boom made its discovery an even more difficult task than usual. After the 1690s boom, Daniel Defoe (of Robinson Crusoé fame) stated that many stocks had been raised above their “intrinsic value” and that shares in the East India Company had sold at between 300 and 400 percent above their nominal value “without any material difference in intrinsic value”. The contemporary land-bank projectors, who wanted to replace a gold-backed currency with one supported by the value of land, even realized that the notion of “intrinsic value” was an oxymoron*, since “intrinsic” suggested and inward quality, while “value” was always external. For instance, Nicholas Barbon argued that “things have no value in themselves, it is opinion and fashion which brings them into use and gives them a value”. John Law, who was also a land-bank projector, went even further and claimed that price was simply the result of the interaction of supply and demand. Applied to the stock market, Law’s idea suggests that share prices are determined by liquidity (the supply of new funds to the market) rather than a reflection of inherent values.

* Note: Oxymoron (oximoro em português) “is a figure of speech in which opposite or contradictory ideas are combined (e.g. thunderous silence, sweet sorrow)”. Webster’s New Dictionary.

According to the text

Item 0 the understanding of the concept of intrinsic value was made more difficult by misleading stock market prospect, manipulation of share prices, and the stock market boom (of the period).

Em um modelo de regressão múltipla, com erros que seguem uma distribuição Normal, identifique se o item é correto:

Item 4 Os métodos de estimação do coeficiente de autocorrelação Cochrane-Orcutt e Durbin são diferentes em pequenas amostras.