Professor，is saving or investment that affects economic growth? Is it right that the more investment in economy, the higher economic growth?

i don't know why A and C are not correct....

Hi, Lin. When there is a budget dificit, governments will sell bonds for money. And individuals will buy the bonds. Why that causes saving decrease? S private = Y+TR - C - T You told us buying financial things is not consumption. So S private does not change. What causes saving decrease?

In this question, i think public saving is $1, because public saving = T-G-TR, but this isn't government purchases, so public saving= T-TR=4-3=1. why the answer is $2?

Hello, Professor
Can you explain more about this question? I cannot understand the explanation in the box.

Hi, Lin! Why choose B in this question? I think because of inflation, the price of goods and service will increase. So it couldn't buy eight times even Real GDP per capital is eight times in 2006 than in 1900.

Hello,Lin.
What is refund payment? How can it be used？Can you explain it and give an example.

Hello, Lin. What are the differences about Financial bonds and financial securities?

On the page 738, the formula "SPrivate= Y+ TR− C− T", in the formula, the"Y" is the meaning of "
Thisportion of household income". And the "Y" also have the meaning of "GDP". Are there two means are same?

In general, potiential GDP always increase, right?