The table below shows the real GDP figures for a hypothetical economy over a three-year period:
| Year | Real GDP (£ billions) |
|---|---|
| 2021 | 500 |
| 2022 | 560 |
| 2023 | 600 |
Assuming a constant, positive capital-output ratio, the accelerator theory predicts that between 2022 and 2023,
planned net investment will become negative because the rate of economic growth has slowed.
planned net investment will fall, but remain positive.
planned net investment will increase because the absolute level of real GDP has risen.
planned net investment will remain constant because the economy is still growing.