="#000100" size="3">and 
</font><font face="Symbol" color="#000100" size="3"><strong>b 
</strong></font><font face="Arial" color="#000100" size="3">is a vector of unknown regression coefficients. This leads to a baseline hazard function of the form <br><br>&nbsp;&nbsp;&nbsp;
</font><font face="Symbol" color="#000100" size="3">l
</font><font face="Arial" color="#000100" size="2"><sub>0
</sub></font><font face="Arial" color="#000100" size="3">(t
</font><font face="Arial" color="#000100" size="2"><sub>i
</sub>