Influence of simulated direction of trend in annual counts and length of stopover duration on bias of estimated trends, when stopover duration remained constant over time.

Reference categories for the independent variables in the linear regression model were no trend (Trend = 0%year-1) and no stopovers > 24 hours (phii = 0). Influence of simulated direction of trend in annual counts and length of stopover duration on bias of estimated trends, when stopover duration remained constant over time.