Second, the Chinese production mix does not correspond to domestic demand, and investment in long products has outpaced demand growth.

This structure contrasts with the pre 1980 business cycle, which rested on wage growth tied to productivity growth and full employment. Wage growth, rather than borrowing and financial booms, fuelled demand growth.

The dramatic improvement in demand in 2002 2004 did of course provide an incentive to add capacity, particularly in countries where continued strong demand growth was foreseen.

The growth of electricity demand will constitute a challenge for many countries in the coming decades.

Total demand and its growth do matter, but so does market share. Given the growth patterns across advanced and developing countries prior to the crisis, and then the large negative shock, it is likely that there is a shortfall of tradable global aggregate demand, impeding an important component of global growth.

In general, growth was broadly based, supported by robust export growth and higher commodity prices as well as strong domestic demand driven by low interest rates.

Due to the rapid growth of its economy, demand for steel has increased at very high rates.

The socio economic changes cited included rapid population growth, high food demand, and land and ecological degradation.

In the short run, the non tradable sector is, by definition, subject to domestic demand constraints. A shortfall in non tradable demand inevitably limits growth on that side of the economy.

But, for individual economies, relative productivity versus income levels determines the share of global tradable aggregate demand that is accessible. Unlike the non tradable side of the economy, the domestic component of global tradable demand is not an absolute constraint on growth nor is the rate of growth of global tradable demand an absolute constraint, given the possibility of increasing share.

So the equation is simple 5.5 1.5 3.5 0.5 . That 0.5 is all that is left for job growth, because that's all the job growth required to meet demand given the remarkably strong rate of growth of productivity.

The growth in domestic investments would not only enhance national wealth, but would also spur the demand for foreign capital and technology in an escalating, mutually reinforcing manner that makes investments demand driven.

So what are Europe s policymakers to do? Restarting growth requires a two handed approach that addresses both supply and demand.

For the energy sector, the common variables used to develop scenarios were population growth, demand, and gross domestic product (GDP).

It also means getting the balance between domestic and external demand right, and appreciating the sensitivity of medium and long term growth to the composition (and size) of domestic aggregate demand. Against this background, monetary policymakers must be cautious, because low interest rates can shift the growth model back toward leverage and domestic consumer demand, stalling the structural shift to the tradable side that is underway.

WASHINGTON , DC China has weathered the Great Recession well. The world now waits to see if last year s impressive domestic demand growth can be sustained, and if China can, in the words of Prime Minister Wen Jiabao, give full play to the leading role of consumer demand in driving economic growth.

But the opposite of the excessive consumption model excessive reliance on investment to generate aggregate demand is also a self limiting growth pattern. When the private and social returns of investment diminish too much, growth cannot be sustained indefinitely, even though rising investment rates can sustain aggregate demand for a while.

Not this time. The record plunge in consumer demand during the Great Recession has been followed by persistently subpar consumption growth.

However, to the extent that public investment grows, aggregate demand increases correspondingly, generating some growth and creating a cushion against recession.

In emerging markets, slow growth in the advanced economies has shut down a traditional development path export led growth. As a result, emerging markets have had to rely once again on domestic demand.

Domestic demand led growth will be a more reliable strategy than export led growth. That means that countries with a large domestic market and a prosperous middle class will have an important advantage.

Against this background, South Korea s new growth strategy should aim to achieve both a demand side rebalancing and supply side productivity increases.

Properly targeted public investment can do much to boost economic performance, generating aggregate demand quickly, fueling productivity growth by improving human capital, encouraging technological innovation, and spurring private sector investment by increasing returns. Though public investment cannot fix a large demand shortfall overnight, it can accelerate the recovery and establish more sustainable growth patterns.

Despite all the talk about the coming shift to internal demand, China remains heavily dependent on exports and external demand as major drivers of economic growth. It is not a coincidence that its last two slowdowns followed closely on the heels of growth slumps in its two largest foreign markets, Europe and the United States.

Growth was broadly based in most countries, and manufacturing, in particular, benefited from the upturn in the electronics cycle and strong export demand.

Growth also accelerated in New Zealand while remaining substantially unchanged in Australia in 2004, supported by buoyant domestic demand and high commodity prices.

Growth in two components of private demand, residential investment and consumption, which account for more than 75 of total spending in the US economy, has been especially slow. Both sources of demand are likely to strengthen in 2013.

Though the US is finally emerging from an extended period in which potential output exceeded demand, high unemployment continues to suppress demand in Europe. One of the main casualties is the tradable sector in China, where domestic demand remains inadequate to cover the shortfall and prevent a slowdown in GDP growth.

Public and private investment which has served as a key driver of China s growth over the last four decades can play a central role in expanding domestic demand, but only if returns are high. While low return investments generate aggregate demand, they do not increase future income or productive potential, and thus do not foster sustainable growth.

But now growth rates for Chinese exports and related indices in manufacturing have fallen, largely owing to weak external demand, especially in Europe. And the Chinese authorities are now scaling back the other major driver of their country s growth, public sector investment, as low return projects seem to generate aggregate demand but prove unsustainable fairly quickly.

China s rebalancing is apparent, first and foremost, in the export sector. Export growth has slowed from its 2001 2008 average of 29 annually to below 10 , making foreign demand a far less critical engine of growth.

The pace of deficit reduction must be slowed, particularly in Spain, because output is determined in the short run by demand, and private demand cannot replace public demand until a degree of faith in the future is restored. This move toward support of effective demand must be combined with the kind of structural reforms that will allow more rapid, supply side growth in the longer term.

The major portion of the consumption growth is attributable to construction applications construction materials are estimated to account for over half of total steel demand.

Even in a situation with relatively slow demand growth and weak prices, new capacity may still be added successfully if production costs are low enough.

The same kind of erosion in home prices could occur in many cities around the world. All that is required is that growth in housing supply eventually outstrips investors faith in capitalism to sustain faster growth in demand.

The major emerging economies were the world s main growth engines following the eruption of the financial crisis in 2008, and, to some extent, they still are. But their resilience has always been a function of their ability to generate enough incremental aggregate demand to support their growth, without having to make up for a large loss of demand in developed countries.

Today s problems are compounded by a lack of sufficient private demand particularly household consumption in the advanced economies to compensate for demand losses stemming from austerity. During the last two decades, consumption drove these countries economic growth, reaching historically high GDP shares.

This means that, unless government spending provides the demand bridge, the large non tradable part of the economy cannot drive growth and job creation. But Italy s government, like that of the United States and other fiscally constrained countries, is subtracting effective demand.

Debt drove growth, creating aggregate demand that would not have existed otherwise. (The same is true of the United States and Japan, though the details differ.)

As incomes rise, categories reach a takeoff point where demand accelerates by 3 5 times. At higher levels of income, markets become saturated and growth slows.

Economic growth is expected to moderate in 2005 in all three countries if the external environment weakens and uncertainty remains about the sustainability of domestic demand.

However, it will be difficult for Yemen to sustain the present growth of domestic demand because of its decreasing oil production and weak non oil exports.

But these demand reducing measures also reduce economic growth, causing deficit reduction targets to be missed. Getting fiscal consolidation back on track then requires more spending cuts, which depress growth still further, causing budget performance to worsen even more.

First, Kicillof attributed Argentina s rapid economic growth in the years between its 2001 debt default and the 2008 global financial crisis to a Keynesian reflation of domestic aggregate demand. Keynes made a tremendous intellectual contribution in showing that supply in a market economy does not necessarily create its own demand, and that demand shortfalls can cause avoidable recessions.

Over the last 18 quarters, annualized growth in real consumer demand has averaged a mere 0.7 , compared to a 3.6 growth trend in the decade before the crisis erupted. Never before has the American consumer been this weak for this long.