Annual Giving Analytics (Part 2)
The previous
post in this Annual Giving Analytics series focused on how analytics can be used
to further the goals of Annual Giving, but how exactly is it done? This post will document and describe a few methods and approaches that can get you going on
furthering your use of the analytics for annual giving at your institution.
Annual giving
is primarily interested in three variables that can influence the dependent variable
of how much a particular constituent is likely to give: Segment, Method, and
Timing. Segment is the demographic segment that a donor is categorized as being
a part of, method is the channel or means by which an individual donor makes gifts, and
timing is exactly when they are asked, either during the calendar year or
relative to specific institutional events.
Building a
predictive model to assess the optimum conditions for annual giving can help
your program to understand a number of things, like which donors are the most likely
to give and therefore who should be prioritized by the program, where ask amounts should be
set for the maximum contribution, and how each solicitation channel like
email, mail, and phone should be utilized. Good places to start when building a
predictive model are who is likely to renew, at what levels should people be
solicited, and who is likely to upgrade to leadership annual giving.
Let's go through the creation of these three models step-by-step:
Giving/Renewal Likelihood Model
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Flag donors in your database that have a renewal history.
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Gather data points such as demographics, activities,
interests, and geography related to these donors.
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Use logistic regression or decision trees to
rank donors based on probabilities to renew.
Ask Amount Model
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Use a linear regression model to predict the
largest or most recent gift given.
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If the resulting “predicted” dollar amount is higher
than the most recent gift amount then increase the ask.
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If the “predicted” amount is lower then leave
the ask amount the same.
Leadership Giving Likelihood Model
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Derive a binary dependent variable for existing
donors at the leadership level.
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Use a binary prediction method like logistic
regression or decision trees to compare independent factors.
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Output will be predicted probability that can be
ranked.
Models like
these can be constructed for any number of donor behaviors that might be important to your institution like sustainer/recurring, catastrophe response, preferred giving channel, or cause or
interest specific appeals. But of course, all of these models are best used
together in order to maximize efficiency and effectiveness. Results for the programs for which the models are used to boost efficiency should be considered
holistically as one strategy and results should be captured not only by appeal but
also by demographic segment. Tracking, testing, and reporting mechanisms must be
in place prior to launch in order to accurately measure performance improvements.