The idea that small changes in people's individual taxes would change the voting behavior of any substantial number of voters is highly unlikely.
Of the 343 lines showing robust behavioral changes, 84 lines showed changes for more than one type of behavior, providing a substantial group for comparison.
Thus, while in the Sylvidae, Muscicapidae and Passeridae migratory behavior explains a substantial fraction of the variation in residual brain size (range 0.17 0.57, Fig. 2), in the Tyrannidae and Fringillidae the fraction explained is significant yet low (0.10 and 0.06, respectively), and in the Corvidae the fraction is not statistically significant.
Boldrin et al. (1999, 2004) and Jimenez-Martín (2006) conclude that, while economic and financial measures of retirement incentives play some role in explaining retirement behavior, a substantial portion of the latter still remains unexplained and cannot be explained by Social Security factors.
And finally, Harkavy-Friedman said: "We worry about contagion and copycat behavior". A substantial body of evidence shows that sensationalized media coverage can lead to both people mimicking a particular suicide and an increase in the actual suicide rate.
However, despite this dramatic regression behavior, a substantial fraction of tumors that have previously regressed to a non-palpable state recur spontaneously in the absence of transgene expression over periods of up to 1 year.
Several studies indicate costs -- including co-payments and other cost-sharing requirements--play a key role in the contraceptive behavior of substantial numbers of U.S. women.
Regardless, the general behavior of substantial inter-cell variation in reflectivity that has been well documented in cones appears to exist in the rods as well.
Our research revealed that these behaviors would make a substantial impact on the perceived effectiveness of an individual contributor.
The intricate social interactions that make schooling fascinating to biologists also present substantial experimental complications because the behavior of an individual can be strongly influenced by the behavior of others within the school [5] [7].
