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Ellen Wagner, Executive Director, WCET.
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presentation at the 15th annual SLN SOLsummit February 27, 2014
http://slnsolsummit2014.edublogs.org/
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Executive Board, SoLAR (Society for Learning Analytics Research)
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Multiply with different modes (map)
1. Performance of sequential execution based vs OpenMP based vector multiply.
2. Comparing various launch configs for CUDA based vector multiply.
Sum with different storage types (reduce)
1. Performance of vector element sum using float vs bfloat16 as the storage type.
Sum with different modes (reduce)
1. Performance of sequential execution based vs OpenMP based vector element sum.
2. Performance of memcpy vs in-place based CUDA based vector element sum.
3. Comparing various launch configs for CUDA based vector element sum (memcpy).
4. Comparing various launch configs for CUDA based vector element sum (in-place).
Sum with in-place strategies of CUDA mode (reduce)
1. Comparing various launch configs for CUDA based vector element sum (in-place).
3. Agenda
• Enrollment in the US
• Background
• Predictive Analytics Workflow
– Business Understanding
– Data Understanding
– Data Preparation
– Modeling
– Evaluation
– Deployment
• Next Steps
• Take Away Messages
• Q&A
4. • Founding Director of a Bachelor of Science in
Data Science program at Becker College
• Faculty of Analytics at Harrisburg University of
Science and Technology
• CBO at 529 LLC (Educational infrastructure
and analytics)
• Data Science Advisor at Metadata.io (ABM,
B2B Demand Generation)
5. Enrollment in the US
The two types of colleges with the biggest declines in enrollment are:
community colleges and for-profit universities. Those schools draw heavily
from low-income and minority households.
Source: http://money.cnn.com/2016/05/20/news/economy/college-enrollment-down/
6. Enrollment in the US
• The 10-year average for college closures is five annually.
• The main struggle for many small colleges is declining enrollment
• Moody’s report predicts that inability of small colleges to increase revenue
will result in triple the number of closures and double the number of mergers
in the coming years.
8. Background
A Private, 4-year College
Enrollment: 2,000 undergraduates
Location: Central Massachusetts
Expectation:
1st year—Build the data structure
2nd year—Run the predictive models
9. “Skunk” Team
• Vice President of Enrollment Management
• Chief Information Officer
• Director of Institutional Research
• Dean of Admissions
• Director of Financial Aid
• Director of Data Science
• Director of Enterprise Applications
• Data Engineer
10. Predictive Analytic Work Flow
The Cross-Industry Standard Process Model of Data
Mining (CRISP-DM)
13. Start with a high-level idea
• Who is my customer?
• What is making my customer complain so much?
14. Enrollment Management &
Admission Funnel
Definition: Enrollment Management
is the organizational integration of
functions such as academic advising,
admissions, financial aid, and
orientation into a comprehensive
institutional approach designed to
enable college and university
administrators to exert greater
influence over the factors that shape
their enrollments (Hossler &
Bontrager, 2015, p. 7-8).
Rules of Progression
Response %
Conversion %
Completion %
Acceptance %
Confirmation %
Capture %
Persistence %
Graduation %
15. Enrollment Management Process
Process:
• Prospect/Inquiry Generation
• Applicant Management
• Deposit/Confirmation Management
• Event Management
• Marketing
• Registrar
Goals:
• Maintain or increase class size
• Increase ethnic diversity
• Improve academic profile
• Increase net tuition revenue
• Lower the tuition discount rate
• Strengthen weak academic
programs
• Maximize the return of strong
academic programs
• Support athletic or other
specialized programs on campus
Hossler, D., & Bontrager, B. (2015). Handbook of strategic enrollment management. San Francisco, CA: Jossey-Bass.
19. Use cases studied prior to design
• A major university in the south of the US
• Started experimenting with analytics in 2003
• Used all available data in modeling
• Leveraged Clearing House data to see where
they were losing students; this allowed to
have a better idea of true competitors. This
led to a completely restructured
understanding of their competition.
• Used ACT datasets for profiling
20. Use cases studied prior to design
• Game-changers and take-away messages:
– Visits to campus made a difference in predicting
which students would enroll
– Freshmen were required to live on campus and
that made students persist better
– Targeting of the out-of-state students based on
geographies where they had a large populations
already. By visualizing large populations with maps
it showed concentrations by the area
21. Use cases studied prior to design
• Determining target markets, the Admission’s business model
changed drastically:
– Hiring regional recruiters in areas of high prospect concentration
– Changing target prospects (high-probability prospects require less
time, more efforts on 60-80% probability prospects)
– Changed the targeting process. Customize targeting messages.
– Changed the types of recruiters they’ve hired – the ones that better
understand data and use that data to bring in the prospects
– Hired a campaign director to track the success of the campaigns
– Used in-house callers to spend a lot of time on calling campaigns
talking to students
– Overlaid prospective students with alumni data sets and reached out
to alumni to host lunches in areas outside of the home state to engage
prospects.
22. Use cases studied prior to design
• Outcomes:
– Launched predictive models in 2003. Most
information was in Excel. Overtime, acquired a CRM
system and leveraged that for consolidation and
accrual of applicant and event data.
– Redundant and irrelevant data in CRM was removed
over time (for example, all students wanted a
scholarship, so they did not include that in their
model)
– Enrollment increase from 20k to 35k over a targeted
period, predominantly due to out-of-state students
23. Be Realistic, Expect Changes!
Goal: Increase
freshmen yield rate
Question: What admitted students
are more likely to deposit?
Reality
26. Initial Questions for Becker
• Determining data sources:
– ACT, what data elements are included and can be
collected
– SAT, what data elements are included and can be
collected
– Clearing House, how long will it take to perform
validation of students’ enrollment to Becker
– Accessing population data to be used in targeting
areas
– Do we know who are our true competitors?
– What are we doing to target students differently?
33. Predictive Modeling Details
• Two years of historical data
• Descriptive: Characteristics and demographics (gender, race/ethnicity, geography, first-gen,
Pell grant receiver, etc.)
• Financial aid: Need-based, merit-based, other grant, loan, work-study, etc.
• Behavioral: Application date; deposited date; Admission activities (phone call, email,
campus visits, etc.)
• Logistic regression
• Predict “deposit” probability for each student (values from 0 to 1)
• Test each predictor separately first vs putting everything in the model
• R/RStudio
• Learning curve, but it’s worth
Data
Model
Tools
34. • Descriptive (Characteristics and demographics)
– Age
– gender
– race/ethnicity
– Geography (regional – New England/Non-New
England, MA/Non-MA, Worcester/Non-Worcester)
– first generation (parental education)
– Pell grant receiver
– Sports activities count
– External activities count
Data
35. • Financial aid:
– need-based
– merit-based
– other grant
– loan
– work-study
– family contribution
Data
37. • Over 800 lines of code
• Majority of code is data transformation and
cleanup
• Supervised modeling
• Logistic regression
Model
38. Why R?
• Open-source (free to use, improve on, and redistribute)
• Runs on most standard OS
• Released frequently
• Graphics capabilities are better than in the most other analytical packages
• Huge and very active user community
• It provides analysts more control over what changes to make and
what assumptions to test.
Tools
40. Why In-house?
• Why in-house?
• Most data cleaning can only be done in-house.
• Colleges have a better control of the modeling
process.
• The process can be repeated once the codes are
written.
• More transparency and evaluation can be done in
house.
42. Evaluation step 1 – score models
• Is model good enough?
– Likelihood Ratio test
– Area under the ROC curve
• Are predictions accurate?
– Confusion matrix
• Which Predictors are most important?
47. Actually using your model!
• Automation
• Getting feedback from model’s output users
• Experimenting and feeding the new learning
back to the model to improve its accuracy
• Monitoring outcomes of the model use
48. Deploy Results—
Be Responsive & Improve the Admissions
Practice
1. The admissions
office will
receive a file
every two
weeks.
2. The file will be
uploaded to
Recruiter.
3. The VP of
Enrollment will
take actions.
49. Challenges in Using Predictive Analytics
• Obstacles in management
No champion for the work
• Obstacles with data
Data need Data infrastructure Data consistency
• Obstacles with modeling
Analyst too zealous or too ambitious
Model is too complex (overfitting – significant
relationshpis are just noise)
50.
51. Next Steps
Build more analytic work
• What areas or school districts should we spend more resources on
(visits, calls, marketing campaign)?
• How do we improve the academic profile of incoming students?
• How can we create new aid models to leverage our intuitional aid
to achieve higher yield?
• Retention - which students are most likely to drop out/transfer?
• Utilizing unstructured data to gain additional insights
Actually USING the results
• What actions need to take place based on scores generated from
predictive models?
• How do we assess the effectiveness of our uplifting marketing
campaigns (including customized emails, number of phone calls,
and other marketing activities)?
52. How else can data analytics help my
school?
• Increasing students’ retention
• Increasing students’ graduation
• Increasing students’/teachers’ performance
• Reducing students’ absence
53. Take Away Messages
• Be realistic to narrow the scope of the predicative
modeling work at the initial stage
• Evaluation of models should be in the process
• Building data structure is more important than
methodology
54. Predictive Modeling Steps and Details
in the Context of College Enrollment
Details in strategic
enrollment
management process
but very general
guideline on modeling
(Page 223-227).
Practical suggestions on
predictive analytics but focus
on the economic field of fraud
detection & customer
satisfaction.
Link the two sides
Build predictive analytics
in the context of college
enrollment
55. References
Abbot, D. (2014). Overview of predictive analytics. Applied predictive analytics: Principles and techniques for the
professional data analyst (17). Indianapolis, IN: Wiley.
Abbot, D. (2014). Setting up the problem. Applied predictive analytics: Principles and techniques for the professional data
analyst (19). Indianapolis, IN: Wiley.
Berg, B. (2012). Predictive modeling: A tool, not the answer: Benefits and cautions of using historical data to predict the
future. University Business. Retrieved from: http://www.universitybusiness.com/article/predictive-modeling-tool-not-
answer
Bergerson, A.A. (2010). College choice and access to college: Moving policy, research and practice to the 21st century. ASHE
Higher Education Report, 35(4). San Francisco, CA: Jossey-Bass.
Cabrera, A.F. (1994). Logistic regression analysis in higher education: An applied perspective. In J.C. Smart (ed.), Higher
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Hosmer, D.W., Lemeshow, S. (2000). Applied logistic regression. (2). New York, NY: John Wiley & Sons, Inc.
Hossler, D. (1991). Evaluating student recruitment and retention programs. New Directions for Institutional Research, 70.
San Francisco, CA: Jossey-Bass.
Hossler, D., & Bontrager, B. (2015). Handbook of strategic enrollment management. San Francisco, CA: Jossey-Bass.
Hossler, D., Gallagher, K. S. (1987). Studying student college choice: A three- phase model and the implications for
policymakers. College and University, 62(3), 207-221.
Hovland, M. (2004). Unraveling the mysteries of student college selection. Paper presented at the 2004 ACT Enrollment
Planner’s Conference. Chicago, IL.
Prescott B. & Bransberger, P. (2013). Knocking at the College Door: Projections of High School Graduates by State, Income,
and Race/Ethnicity, Boulder, CO: Western Interstate Commission for Higher Education.
Luan, J. (2002). Data mining and its applications in higher education. New Directions for Institutional Research, 113,17-36.
McPherson, M.S. (1991). Does student aid affect college enrollment? New evidence on a persistent controversy. The
American Economic Review, 81(1), 309-318.
Perna, L. (2006). Studying college access and choice: A proposed conceptual model. Higher Education: Handbook of Theory
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Sigillo, A. (2015). Predictive modeling in enrollment management: New insights and techniques. Retrieved from:
http://www.uversity.com/downloads/research/EI%20Whitepaper_R6.pdf