how to test lagged effect in mixed model what is the formula for lagged effect? which model is used when the independent variable x is a lagged dependent variable? what is simultaneous and lagged effects can simultaneous lag be tested for time varying covariates? how to test lagged vs concurrent effects how to calculate simultaneous and lagged effects is it possible to test concurrent vs lagged effects is it possible to test concurrent lagged effects when to test lagged effect lmer how to find lagged time which model can test simultaneous and lagged effects? which is a lagged effect lmer model lagged when to include both simultaneous and lagged effects what is lmer for simultaneously and lagged effect when to test concurrent vs lagged can lmer models use time-varying covariates what is the formula for time varying coefficients what is lagged effect in dna