That decision had a bad effect on our project.

He is majoring in economics.

The next census will be conducted next year.

Demography is a part of social science that studies the structure, evolution, and problems of human population.

He is a renowned economist who has written many important papers.

Demography is a branch of social science that studies the structure, distribution, and changes in human population.

Tokyo is the city with the highest population density in Japan.

He is facing economic problems.

The government has announced a new budget plan.

Looking at the population pyramid, you can see that this country is aging.