Least squares method is not appropriate for estimating JSB inlineImage" height="14" width="9" alt="View the MathML source" style="margin-top: -5px; vertical-align: middle" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S0378437116304551-si63.gif"> of Barabási–Albert graphs.
A modified version of Clauset et al. (2009) is more preferable for estimation.
Simulated graphs show that exponent is not the theoretical for small graphs.
Value of is also dependent on number of edges added, m, for small graphs.
Smaller value of m results in larger value of for all graph sizes.