Boeing plans to announce a decision by early next year on where it will assemble the 777X airplane. States are offering billions of dollars of tax breaks, property and customized employee training as part of the competition to land the assembly plant.Unlike for the 777X, Stephenson said Boeing did not seek out incentives from states for the research jobs. But some states are nonetheless offering incentives to Boeing. In Missouri, for example, Boeing could receive up to $16.8 million of incentives over six years, depending on the number of jobs created and their salaries. Earlier this year, Boeing announced that it also was restructuring its information technology unit.