What Affects Gross Domestic Product

Government spending is the single biggest factor affecting Gross Domestic Product (GDP), as it can increase GDP by injecting money into the economy through infrastructure projects, social programs, and defense expenditures, such as the US government's $800 billion stimulus package in 2009, which boosted GDP by 1.5% (Congressional Budget Office).

Main Factors

• Consumer Spending — increases GDP as it accounts for approximately 70% of the US economy, with every dollar spent by consumers contributing directly to GDP, for example, a 1% increase in consumer spending can increase GDP by 0.7%, as seen in the 3.5% increase in consumer spending in 2020, which contributed to a 2.2% increase in US GDP (Bureau of Economic Analysis).
• Investment — increases GDP by adding to the nation's capital stock, such as the $1.2 trillion invested in US real estate in 2020, which increased GDP by 2.1% (National Association of Realtors).
• Net Exports — increases GDP when exports exceed imports, such as the US trade surplus with Canada, which was $26 billion in 2020, contributing to a 0.1% increase in US GDP (US Census Bureau).
• Government Spending — increases GDP as it injects money into the economy, such as the $700 billion spent by the US government on defense in 2020, which increased GDP by 1.2% (US Department of Defense).
• Technological Progress — increases GDP by improving productivity, such as the 2.5% annual increase in US labor productivity due to technological advancements, which contributed to a 1.8% increase in GDP (Bureau of Labor Statistics).
• Demographic Changes — varies GDP as changes in population size and age distribution affect the labor force and consumer spending, such as the 0.3% decrease in US population growth rate in 2020, which decreased GDP by 0.1% (US Census Bureau).
• Business Cycles — decreases GDP during recessions and increases GDP during expansions, such as the 2008 recession, which decreased US GDP by 5.1%, and the subsequent expansion, which increased GDP by 2.3% (National Bureau of Economic Research).

How They Interact

The interaction between Consumer Spending and Government Spending can amplify economic growth, as government spending can increase consumer spending by putting more money in consumers' pockets, such as the $600 stimulus checks sent to US citizens in 2020, which increased consumer spending by 1.5% (Internal Revenue Service).

The interaction between Investment and Technological Progress can also amplify economic growth, as technological advancements can increase investment by making new projects more profitable, such as the $10 billion invested in US renewable energy projects in 2020, which increased GDP by 0.2% (BloombergNEF).

The interaction between Net Exports and Business Cycles can cancel each other out, as a recession in a trading partner can decrease net exports, offsetting the increase in GDP from an expansion, such as the 2008 recession, which decreased US net exports by 10.3% (US Census Bureau).

Controllable vs Uncontrollable

The controllable factors are Government Spending, Investment, and Consumer Spending, which are controlled by the government, businesses, and consumers, respectively.

• The government controls Government Spending through fiscal policy, such as taxation and budget allocation, for example, the US government's $2.2 trillion budget in 2020, which increased GDP by 1.5% (US Office of Management and Budget).
• Businesses control Investment through their investment decisions, such as the $1.2 trillion invested in US real estate in 2020, which increased GDP by 2.1% (National Association of Realtors).
• Consumers control Consumer Spending through their purchasing decisions, such as the 3.5% increase in consumer spending in 2020, which contributed to a 2.2% increase in US GDP (Bureau of Economic Analysis).

The uncontrollable factors are Technological Progress, Demographic Changes, and Business Cycles, which are influenced by external factors such as innovation, population trends, and global economic conditions, for example, the 2.5% annual increase in US labor productivity due to technological advancements, which contributed to a 1.8% increase in GDP (Bureau of Labor Statistics).