How does the government attempt to encourage positive externalities and limit negative externalities?

the answer is:

it led to riots and destruction of jewish shops, homes, and synagogues.

it turned german citizens against jews.

no , per capita income is not a true measure of the development because: -it only tells us about average income not how income is distributed among the people.it only give us an idea of the economic aspect.it is only at the qualitative basis.moreover, income is not only the way of development other factors are also as much as important as income.