The increase in the explained share only shows that the model including school characteristics explains a much higher share of the change than the reduced model.
Our conceptual model included school career and health-compromising (HCB) and health-enhancing (HEB) behaviours as well as family background.
Simulation models that include school closures are sensitive to assumptions regarding the level of nonschool contacts that occur (18, 19 ).
This association was no longer significant in the fully-adjusted model which included school travel time as a proxy for home-school distance.
All these models included riding school as a repeated (random) effect using an exchangeable correlation.
Breakfast models also included school-breakfast location (classroom; cafeteria).
In recent months, however, Mr. Klein and Michele Cahill, his senior counsel for educational policy, have talked about the need to use many different models, including charter schools, to raise performance and accountability and to provide city students and their parents with more choices.
Other social-behavioral parameters that are considered by the reviewed models include reactive withdrawal from work or school due to appearance of symptoms [ 27], work absenteeism to care for sick relatives or children at home due to school closure [ 27, 36, 38, 43], and compliance to social distancing, vaccination, and antiviral prophylaxis [ 28, 37].
The model in Table 4 includes school characteristics such as total enrollment, school location, whether the school is financed by public or private funds and the proportion of foreign language speakers in the school.
Therefore, four-level models including levels of school, classes, individuals and waves, with random intercepts for school, classes and individuals will be conducted.
