Genuine progress indicator (GPI) is a metric that has been suggested to replace, or supplement, gross domestic product (GDP). The GPI is designed to take fuller account of the well-being of a nation, only a part of which pertains to the size of the nation's economy, by incorporating environmental and social factors which are not measured by GDP. For instance, some models of GPI decrease in value when the poverty rate increases. The GPI separates the concept of societal progress from economic growth. The GPI is used in ecological economics, "green" economics, sustainability and more inclusive types of economics. It factors in environmental and carbon footprints that businesses produce or eliminate, including in the forms of resource depletion, pollution and long-term environmental damage. GDP is increased twice when pollution is created, since it increases once upon creation (as a side-effect of some valuable process) and again when the pollution is cleaned up; in contrast, GPI counts the initial pollution as a loss rather than a gain, generally equal to the amount it will cost to clean up later plus the cost of any negative impact the pollution will have in the meantime. While quantifying costs and benefits of these environmental and social externalities is a difficult task, "Earthster-type databases could bring more precision and currency to GPI's metrics." It has been noted that such data may also be embraced by those who attempt to "internalize externalities" by making companies pay the costs of the pollution they create (rather than having the government or society at large bear those costs) "by taxing their goods proportionally to their negative ecological and social impacts". GPI is an attempt to measure whether the environmental impact and social costs of economic production and consumption in a country are negative or positive factors in overall health and well-being. By accounting for the costs borne by the society as a whole to repair or control pollution and poverty, GPI balances GDP spending against external costs. GPI advocates claim that it can more reliably measure economic progress, as it distinguishes between the overall "shift in the 'value basis' of a product, adding its ecological impacts into the equation". Comparatively speaking, the relationship between GDP and GPI is analogous to the relationship between the gross profit of a company and the net profit; the net profit is the gross profit minus the costs incurred, while the GPI is the GDP (value of all goods and services produced) minus the environmental and social costs. Accordingly, the GPI will be zero if the financial costs of poverty and pollution equal the financial gains in production of goods and services, all other factors being constant.
Motivations Some economists assess progress in an economy's welfare by comparing its gross domestic product over time — that is, by adding up the annual dollar value of all goods and services produced within a country over successive years. However, GDP was not intended to be used for such purpose. It is prone to productivism or consumerism, over-valuing production and consumption of goods, and not reflecting improvement in human well-being. It also does not distinguish between money spent for new production and money spent to repair negative outcomes from previous expenditure. For example, it would treat as equivalent one million dollars spent to build new homes and one million dollars spent in aid relief to those whose homes have been destroyed, despite these expenditures arguably not representing the same kind of progress. This is relevant for example when considering the true costs of development that destroys wetlands and hence exacerbates flood damages. Simon Kuznets, the inventor of the concept of GDP, noted in his first report to the US Congress in 1934:the welfare of a nation can scarcely be inferred from a measure of national income. In 1962, he also wrote:
Distinctions must be kept in mind between quantity and quality of growth, between costs and returns, and between the short and long run... Goals for more growth should specify more growth of what and for what. Some have argued that an adequate measure must also take into account ecological yield and the ability of nature to provide services, and that these things are part of a more inclusive ideal of progress, which transcends the traditional focus on raw industrial production.
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