Abstract
One justification offered for legacy admissions policies at universities is that that they bind entire families to the university. Proponents maintain that these policies have a number of benefits, including increased donations from members of these families. We use a rich set of data from an anonymous selective research institution to investigate which types of family members have the most important effect upon donative behavior. We find that the effects of attendance by members of the younger generation (children, children-in-law, nieces and nephews) are greater than the effects of attendance by the older generations (parents, parents-in-law, aunts and uncles). Previous research has indicated that, in a variety of contexts, men and women differ in their altruistic behavior. However, we find that there are no statistically discernible differences between men and women in the way their donations depends on the alumni status of various types of relatives. Neither does the gender of the various types of relatives who attended the university seem to matter. Thus, for example, the impact of having a son attend the university is no different from the effect of a daughter.
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Notes
In regressions that include the right hand side variables listed in Table 1, the marginal effect of a relative who attended Anon U on the probability of making a donation is 0.101 (SE = 0.0043) and the proportional effect on the amount given, conditional on making a gift, is 0.0429 (SE = 0.0139).
More technically, if alumni without relatives were in the sample, then the reference group for each relation would consist of those with no alumni relatives at all and those with some other type of relative. It would be difficult to interpret such results.
Anon U began did not begin admitting women until the 1960s. Consequently, we have grandfathers and great-uncles in our sample, but no grandmothers or great-aunts. The “other in-law” category is relatively small and includes cousins, grandparents, aunts and uncles, and nieces and nephews-in-law.
Our data indicate whether an individual was ever married to a fellow alumnus of Anon U, but information about when the marriage took place is spotty In effect, then, the spouse and in-law variables measure whether the individual ever had that type of relative. The “Alternative Specifications” section shows that it is unlikely that this limitation in the data affects our substantive results.
Not surprisingly, then, when we estimated a model in which each variable was the number of relatives in each category, we found that there was little difference in our substantive results.
Thus, for example, it would not be appropriate to use a Tobit model, which imposes the constraint that the marginal effect of a given variable on the probability of giving and the marginal effect on the amount given are the same up to a constant of proportionality.
More precisely, this is the complete dominance hurdle model. See the Appendix for further details on the derivation of the empirical model.
Denote the amount of giving as Y, and the vector of right hand side variables as X. Then the first stage of the estimation gives results for Pr[Y > 0|X] and the second stage gives E[Y|X,Y > 0]. The unconditional value of giving, E[Y|X], is Pr[Y > 0|X]*E[Y|X,Y > 0]. The marginal effects, ∂E[Y|X]/∂X, are straightforward to compute, and standard errors are obtained using the delta method.
Note that because of the presence of a constant in the model, even in the presence of insignificant or negative coefficients, it can still predict positive values of donations. Indeed, because the left hand side variable is the logarithm of amount given, negative values for the level of giving are ruled out.
Due to lack of reliable data regarding the start- and stop-dates of occupation and field, these variables indicate whether the alumnus was ever involved in that field or occupation, rather than whether they are involved during the particular year of observation.
As noted earlier, in our data, half of any gift donated by an individual is credited to the person’s spouse. Hence, it makes no sense to interact the gender and spouse variables, so such interactions are not included in this table.
The effect of these family connections would ordinarily be subsumed into the unobservable component of alumni giving, one part of which is the individual alumnus’s or alumna’s affinity for the school. Brittingham and Pezzullo (1990) point out that one of “the best predictors of alumni giving [is] an emotional attachment to the school.” From this standpoint, our data allow us to estimate the extent to which emotional attachment is enhanced through the formation of family bonds.
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Acknowledgements
We are grateful to Donna Lawrence, Brian McDonald, Ashley Miller, Julie Shadle, and two referees for useful suggestions. This research was supported by Princeton’s Center for Economic Policy Studies.
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Appendix
Appendix
Derivation of the Estimating Equations
In this Appendix we derive the equations that comprise our canonical econometric model. As in Cunningham and Cochi-Ficano (2002), we assume a conventional utility-maximization framework. Consider an alumnus whose utility depends on the consumption of two commodities. The first is a composite numeraire consumption good, C, and the second is donations to her alma mater, D. The individual’s problem is to maximize a utility function, U,
subject to
where Z is a vector of the individuals’ attributes that affect the amount of utility that she derives from her consumption bundle, pD is the opportunity cost of a dollar of donations, and M is money income. In our context, Z includes, inter alia, variables that characterize the individual’s affinity to her school, including which members of her family attended.Footnote 13 Then the utility maximizing amount of donations, D*, is given by
where V(•) is the indirect utility function.
As noted in the text, in our data there are a substantial number of observations in which individuals make no donations in a given year. Several statistical models can be used to estimate the model in this situation (See, Ground and Koch 2007) The approach that makes the most sense in our context is the complete dominance hurdle model, which has been used in previous empirical studies of charitable giving (see, for example, Huck and Rasul 2007). In this model, in the first stage, an individual decides whether or not to make a gift. In the second stage, conditional on having made the decision to give, the individual gives a positive amount. Intuitively, because an individual can give as much or as little as she wants in a given year, once she has decided to make a gift, there is no second hurdle to clear when determining the amount. In essence, we assume that anyone who wishes to make a gift does so.
To implement this framework, we follow Florkowski et al. (2000). We define Ω to be the variable that equals one if the individual decides to make a donation in the first stage; otherwise it is zero. Assuming linearity,
where θ is a parameter vector and ε is a normally distributed error term. Ω equals 1 if Ω* > 0 and 0 otherwise. Again assuming linearity, we can write
where beta is a parameter vector, and mu is a random error. Observed donations, D, equal desired donations, D* as long as Ω is greater than zero:
If not,
As demonstrated in Florkowski et al. (2000), assuming that μ and ε are normally distributed and uncorrelated, then the first stage equation is a probit, and the second stage equation can be estimated by ordinary least squares, using only the observations with positive values of donations. This is the statistical approach used in the text.