Hi Everyone! I am working on crash data. My dependent variable is dichotomous, and the independent variables have categories. But I created a new variable for each category within a variable. For example if there are 3 vehicle types (CAR, BUS, TRUCK), and vehicle type is my independent variable. I created three variables named car, bus and truck and if the vehicle involved in the crash is car then I assigned numeric '1' in that row and other two variables have zeros. After converting all sub categories into variables, total I have 85 variables. I have used proc qlim to develop a binary logit model, between my dependent variable (fatality is there or not) and all my dichotomous independent variables, I am always have missing standard errors, t-statistics values in the output. It is also showing an error message of hessian matrix is singular. I could not figure this out. Please help me. Thanks in advance. I am attaching a couple of rows and columns for reference. fatnot ascfatal ssr ls pva pr rpa rma rmac rmic rl upa uma uc ul ol tl thl 0 1 1 0 0 0 0 0 0 0 1 0 0 0 0 0 1 0 0 1 1 0 0 0 0 0 0 0 1 0 0 0 0 0 1 0 1 1 1 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 1 1 0 0 0 0 0 0 0 1 0 0 0 0 0 1 0 1 1 1 0 0 0 0 0 0 0 0 0 1 0 0 0 1 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0
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