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In economics, the Dutch disease is a concept that purportedly explains the apparent relationship between the increase in exploitation of natural resources -in this specific case natural gas- and a decline in the manufacturing sector combined with moral hazard or fallout resulting from parliamentary or democratic deficit and asymmetric relations or information asymmetry within Public-Private Partnerships. The theory is that an increase in revenues from natural resources will deindustrialise a nation’s economy by raising the exchange rate, which makes the manufacturing sector less competitive and public services entangled with business interests. However, it is extremely difficult to definitively conclude that natural resource exploitation is the primary or sole cause of decreasing revenues in the manufacturing sector, since there are often many other factors at play in the very complex global economy. While it most often refers to natural resource discovery, it can also refer to "any development that results in a large inflow of foreign currency, including a sharp surge in natural resource prices, foreign assistance, and foreign direct investment".
The term was coined in 1977 by The Economist to describe the decline of the manufacturing sector in the Netherlands after the discovery of a large natural gas field in 1959, culminating in the world's biggest public-private partnership N.V. Nederlandse Gasunie between Esso (now ExxonMobil), Shell and the Dutch government in 1963.
 The “Core Model”
The classic economic model describing Dutch Disease was developed by the economists W. Max Corden and J. Peter Neary in 1982. In the model, there is the non-traded good sector (this includes services) and two traded good sectors: the booming sector, and the lagging sector, also called the non-booming tradable sector. The booming sector is usually the extraction of oil or natural gas, but can also be the mining of gold, copper, diamonds or bauxite, or the production of crops, such as coffee or cocoa. The lagging sector generally refers to manufacturing, but can also refer to agriculture.
A resource boom will affect this economy in two ways. In the "resource movement effect", the resource boom will increase the demand for labor, which will cause production to shift toward the booming sector, away from the lagging sector. This shift in labor from the lagging sector to the booming sector is called direct-deindustrialisation. However, this effect can be negligible, since the hydrocarbon and mineral sectors generally employ few people. The "spending effect" occurs as a result of the extra revenue brought in by the resource boom. It increases the demand for labor in the non-tradable, shifting labor away from the lagging sector. This shift from the lagging sector to the non-tradable sector is called indirect-deindustrialisation. As a result of the increased demand for non-traded goods, the price of these goods will increase. However, prices in the traded good sector are set internationally, so they cannot change. This is an increase of the real exchange rate.
In simple trade models, a country ought to specialise in industries that it has a comparative advantage in, so theoretically a country rich in natural resources would be better off specialising in the extraction of natural resources. In reality, however, the shift away from manufacturing can be detrimental.
If the natural resources begin to run out or if there is a downturn in prices, competitive manufacturing industries do not return as quickly or as easily as they left. This is because technological growth is smaller in the booming sector and the non-tradable sector than the non-booming tradable sector. Since there has been less technological growth in the economy relative to other countries, its comparative advantage in non-booming tradable goods will have shrunk, thus leading firms not to invest in the tradables sector. Also, volatility in the price of natural resources, and thus the real exchange rate, may prevent more investment from firms, since firms will not invest if they are not sure what the future economic conditions will be.
There are also many other harmful effects often associated with Dutch disease, such as corruption and protectionist policies for affected lagging sector industries. However, these effects can most accurately be described as part of the broader resource curse.
There are two basic ways to reduce the threat of Dutch disease: by slowing the appreciation of the real exchange rate and by boosting the competitiveness of the manufacturing sector.
One approach is to sterilize the boom revenues, that is, not to bring all the revenues into the country all at once, and to save some of the revenues abroad in special funds and bring them in slowly. Sterilisation will reduce the spending effect. Another benefit of letting the revenues into the country slowly, is that it can give a country a stable revenue stream, rather than not knowing how much revenue it will have from year to year. Also, by saving the boom revenues, a country is saving some of the revenues for future generations. Especially in developing countries, this can be politically difficult as there is often pressure to spend the boom revenues immediately to alleviate poverty, but this ignores broader macroeconomic implications. Examples of these sovereign wealth funds include the Government Pension Fund in Norway, the Stabilization Fund of the Russian Federation or the State Oil Fund of Azerbaijan or the Future Generations Fund of the State of Kuwait established in 1976. Recent talks led by the United Nations Development Programme in Cambodia – International Oil and Gas Conference on fueling poverty reduction – point at the need for better education of state officials and energy cadres linked to a possible Sudden Wealth Fund to avoid the Resource curse/Paradox of plenty. Another strategy for avoiding real exchange rate appreciation is to increase saving in the economy in order to reduce large capital inflows which are able to cause an appreciation of the real exchange rate. This can be done if the country runs a budget surplus. A country can encourage individuals and firms to save more by reducing income and profit taxes. By increasing saving, a country can reduce the need for loans to finance government deficits and foreign direct investment.
Investing in education and infrastructure is able to increase the competitiveness of the manufacturing sector. An alternative is that a government can resort to protectionism, that is, increase subsidies or tariffs. However, this could be a dangerous strategy and could worsen the effects of Dutch Disease, as large inflows of foreign capital are usually provided by the export sector and bought up by the import sector. Imposing tariffs on imported goods will artificially reduce that sector’s demand for foreign currency, leading to further appreciation of the real exchange rate.
It is rather difficult to definitively say that a country has Dutch Disease because it is difficult to prove the relationship between an increase in natural resource revenues, the real-exchange rate and a decline in the lagging sector. There are a number of different things that could be causing this appreciation of the real exchange rate. The Balassa-Samuelson effect occurs when productivity increases affect the real exchange rate. Also important are changes in the terms of trade and large capital inflows. Often these capital inflows are caused by foreign direct investment or to finance a country’s debt.
Similarly, it is difficult to show what is causing a decrease in the lagging sector. A case in point is the Netherlands. Though this effect is named after the Netherlands, economists have argued that the decline in the Dutch manufacturing industry was actually caused by unsustainable spending on social services.
 Possible examples
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