Complex sentence: These immigrants were able to shape the economy of the city through their labor and settlement in the city, they created more job openings as well as a market for new private owned businesses where these laborers had the opportunity to buy goods and other needed services.
Split into simpler sentences: These immigrants were able to shape the economy of the city through their labor and settlement in the city. They created more job openings as well as a market for new private owned businesses where these laborers had the opportunity to buy goods and other needed services.