You make an investment with other real estate investors. Because of the profit-oriented nature, and the fact that the profit depends solely on the management effort of others, this is likely what

The movement of an economy from one condition to another and back again

Amachine purchased three years ago for $720,000 has a current book value using straight-line depreciation of $400,000: its operating expenses are $60,000 per year. a replacement machine would cost $480,000, have a useful life of nine years, and would require $26,000 per year in operating expenses. it has an expected salvage value of $130,000 after nine years. the current disposal value of the old machine is $170,000: if it is kept 9 more years, its residual value would be $20,000. calculate the total costs in keeping the old machine and purchase a new machine. should the old machine be replaced?

Any point on a country's production possibilities frontier represents a combination of two goods that an economy: