Zoran, a croatin citizen, only works in the united states. the value added to production from his employment is

The value that is added to production from his employment is included only in the United States GDP

Explanation:

The value that is added is included only in the United States  and Gross Domestic Product is the value of all the finished goods that is produced within the country during the specific period of time

There are many ways to calculate the GDP by the expenditure method the production method or the income method this is used to predict the economy of the country and provides a snapshot of the economic growth. In this case the value added to the production goes to the United States gross domestic product