The pollution haven hypothesis posits that, when large industrialized nations seek to set up factories or offices abroad, they will often look for the cheapest option in terms of resources and labor that offers the land and material access they require. However, this often comes at the cost of environmentally unsound practices. Developing nations with cheap resources and labor tend to have less stringent environmental regulations, and conversely, nations with stricter environmental regulations become more expensive for companies as a result of the costs associated with meeting these standards. Thus, companies that choose to physically invest in foreign countries tend to (re)locate to the countries with the lowest environmental standards or weakest enforcement.
Three scales of the hypothesis Pollution control costs have an impact at the margins, where they exert some effect on investment decisions and trade flows. Pollution control costs are important enough to measurably influence trade and investment. Countries set their environmental standards below socially-efficient levels in order to attract investment or to promote their exports. Scales 1 and 2 have empirical support, but the significance of the hypothesis relative to other investment and trade factors is still controversial. One study found that environmental regulations have a strong negative effect on a country's FDI, particularly in pollution-intensive industries when measured by employment. However, that same study found that the environmental regulations present in a country's neighbors have an insignificant impact on that country's trade flows.
Formula and variations Yi = αRi + XiβI + εi In the above formula, Y is economic activity, R is regulatory stringency, X is an aggregate of other characteristics that affect Y and ε is an error term. Theoretically, by changing your value of R, analysts will be able to calculate the expected effect on economic activity. According to the Pollution Haven Hypothesis, this equation shows that environmental regulations and economic activity are negatively correlated, because regulations raise the cost of key inputs to goods with pollution-intensive productions and reduce jurisdictions' comparative advantage in these goods. This lack of comparative advantage causes firms to move to countries with lower environmental standards, decreasing Y. There is also an expanded formula, as shown below:
Yit = vi + αRit + γTit + θRitTit + X’βit + εit This expanded formula takes into account whether trade liberalization (i.e. the level of trade barriers that exist in a country, labeled as T) increases the negative correlation between economic activity (Y) and regulatory stringency (R). Some authors claim that trade barriers disproportionately effect the environment, and this equation attempts to quantify the interaction between trade barriers and regulatory stringency, and the corresponding effect with respect to output in an economy.
Connection with the environmental Kuznets curve
The environmental Kuznets curve (EKC) is a conceptual model that suggests that a country's pollution concentrations rise with development and industrialization up to a turning point, after which they fall again as the country uses its increased affluence to reduce pollution concentrations, suggesting that the cleaner environment in developed countries comes at the expense of a dirtier environment in developing countries. In this sense, the EKC is potentially a reflection of the Pollution Haven Hypothesis, because one of the factors that may drive the increase in environmental degradation seen in pre-industrial economies is an influx of waste from post-industrial economies. This same transfer of polluting firms through trade and foreign investment could lead to the decrease in environmental degradation seen in downward-sloping section of the EKC, which models post-industrial (service) economies. This model holds true in cases of national development, but cannot necessarily be applied at a local scale.
Real-world example Used lead–acid batteries that Americans turn in to be recycled are increasingly being sent to Mexico, where the lead inside them is extracted by crude methods that are illegal in the United States. In 2009, the Environmental Protection Agency significantly tightened National Ambient Air Quality Standards for lead pollution, which made domestic recycling more difficult and expensive in the United States, but did not prohibit companies from exporting the work and danger to countries where environmental standards are low and enforcement is lax. Following this change, exports of used lead-acid batteries increased four-fold, which was followed by a significant increase in babies born with low birth weight to mothers living within a two-mile (3.2 km) radius of Mexican battery-recycling plants. In this sense, Mexico serves as a pollution haven for the United States battery industry because Mexican environmental officials acknowledge that they lack the money, manpower, and technical capacity to police the flow. According to The New York Times in 2011, 20% of spent American vehicle and industrial batteries were being exported to Mexico, up from 6% in 2007, meaning that approximately 20 million batteries would cross the border that year. A significant proportion of this flow was being smuggled in after being mislabeled as metal scrap.
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