Keynes concluded that the government should engage in massive public spending to provide serious prop up aggregate demand and stop the downward spirals. On that front, he argued that budget deficits $($when the government spends more than taxes people$)$ in themselves are not necessarily a bad thing. Positive $($or negative$)$ effects will depend on which of the following according to DAY $4$ lecture notes?

how large deficit is relative to the economy's ability to produce goods and services

timing of deficit spending $($for e$.$g$.$ recession or economic boom$)$

Say's Law

what govt. spending is used for $($education$,$ mass transit vs$.$ bombs, infrastructure, green economy, pandemic relief$)$

the level of taxes the government collected through fiscal policy