Consider the following economy:(1) C = 1000 + 0.3 (Y - T)(2) I = 700(3) G = 500(4) T = 400Autonomous spending is:

To determine the autonomous spending in this economy, we need to identify the components of aggregate demand that are not influenced by changes in income or taxes.

In equation (1), C represents consumption, which is influenced by disposable income (Y - T). The term 0.3 represents the marginal propensity to consume (MPC), indicating that 30% of any increase in disposable income will be spent. The constant term 1000 represents autonomous consumption, which is not influenced by changes in income or taxes.

In equation (2), I represents investment, which is not influenced by changes in income or taxes. The constant term 700 represents autonomous investment.

In equation (3), G represents government spending, which is also not influenced by changes in income or taxes. The constant term 500 represents autonomous government spending.

In equation (4), T represents taxes, which are determined independently of income. The constant term 400 represents autonomous taxes.

Therefore, the autonomous spending in this economy is the sum of the autonomous consumption, investment, government spending, and taxes:

Autonomous spending = autonomous consumption + autonomous investment + autonomous government spending + autonomous taxes = 1000 + 700 + 500 + 400 = 2600

Hence, the autonomous spending in this economy is 2600.