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 4 highlighted the differences between the American and the European movements.

Avalie a afirmativa abaixo. Seja:

!$ A = { \begin{bmatrix} 0\,\,\,\,1\\1\,\,\,\,0 \end{bmatrix}} !$

Item 3 Seja I a matriz identidade de ordem 2. As matrizes A - I e A + I são inversíveis.

"Mandate, regulate, litigate." That has been the green mantra. And it explains the world's top-down, command-and-control approach to environmental policymaking. Slowly, this is changing. Yesterday's failed hopes, today's heavy costs and tomorrow's demanding ambitions have been driving public policy quietly towards market-based approaches. One example lies in the assignment of property rights over "commons", such as fisheries, that are abused because they belong at once to everyone and no one. Where tradable fishing quotas have been issued, the result has been a drop in over-fishing. An emission trading is also taking off. America led the way with its sulphur-dioxide trading scheme, and today the EU is pioneering carbon-dioxide trading with the (albeit still controversial) goal of slowing down climate change.

According to the text,

Item 3 past experience and rising ambitions for the future are the forces that are shaping up market-based approaches to environmental policies.

As funções de demanda e oferta do produto X, em um mercado competitivo, são dadas, respectivamente, por !$ D(p) = 100.000 -1.000p^2 !$ e !$ S(p) = 46.000 + 500p^2 !$. A função de custo total da firma A neste mercado é !$ C_A (x)= { \Large { 1 \over 450}} x^3 + 30 !$, em que x é o número de unidades produzidas de X. Com base nesses dados, avalie a afirmativa:

Item 4 Suponha que em vez da firma A tenha-se uma indústria monopolista com a mesma função demanda. Este monopolista quer saber quanto deve produzir em dois períodos consecutivos. No primeiro período, devido aos custos de instalação, o custo de produção é !$ C_A(x) = { \Large { 1 \over 450}} x^3 + 30 !$, enquanto no segundo o custo é !$ C_A (x) = { \Large { 1 \over 450}} x^3 !$. Mantendo-se a demanda inalterada, a produção do monopolista no segundo período será maior que no primeiro.