PI Aging Simulation Model J. Chris White, Twilighttraining.com Walter T. Schaffer, Ph.D. OER, OD, NIH June 4, 2008.

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Presentation transcript:

PI Aging Simulation Model J. Chris White, Twilighttraining.com Walter T. Schaffer, Ph.D. OER, OD, NIH June 4, 2008

RPG PI Stocks

Basic Structure for Age Group PIs in the system that have “aged” enough to move to the next age group. New PIs (i.e., first-time) that enter the NIH pool in this age group. PIs of this age group that do not get funded the following year. Stock - Represents the number of PIs in the total pool that are in this age group. PIs in the system that have “aged” enough to move into this age group. PIs who experienced a gap in funding now returning into this age group.

Connecting Age Groups

SimBLOX Methodology Simulation “agent” model SimBRIX “icon”

SimBLOX Example SimBRIX Drag-and-drop SimBRIX to build larger model Input parameters for selected SimBRIX

Simulation Results – FY1980

Simulation Results – FY2005 RMS = 0.38%

Avg Ages: FY80 = 39.0 FY85 = 41.1 FY90 = 43.7 FY95 = 45.8 FY00 = 47.8 FY05 = 49.5 FY10 = 50.9 FY15 = 52.1

Conclusions and Next Steps Simulation matches historical data with high fidelity over 25 years: RMS = 0.38% for worst fit for FY RMS = 0.011% for total PI’s for simulation Incorporate external variables as necessary: Ex: NIH annual budget, success rates Add “feedback loops” into model structure: Relationships among key variables and flow rates (e.g., as success rate increases, how do new or funded PI’s respond) Relationship of influx to efflux in various budget climates Develop Scenarios for more or fewer New Investigators on total PI Pool Develop Scenarios to estimate effect of switching to Early Stage Investigators

Add Entrance/Exit Feedback Loop: Balance Influx and Efflux New PIs (i.e., first-time) that enter the NIH pool in this age group. PIs of this age group that do not get funded the following year. PIs who experienced a gap in funding now returning into this age group.

Members of Workgroup Bachrach, Christine (NIH/NICHD) Barr, Robin (NIH/NIA) Bartrum, John (NIH/OD) Berg, Jeremy (NIH/NIGMS) Boyle, Michael (NIH/OD) Braveman, Norman (NIH/NIDCR) Bronson, Charlette (NIH/NIA) Charles Sherman Clark, Rebecca (NIH/NICHD) DeLeo, James (NIH/CC/DCRI) Dumais, Charles (NIH/CSR) Glanzman, Dennis (NIH/NIMH) Glavin, Sarah (NIH/NIDCR) Khachaturian, Henry (NIH/OD) Lederhendler, Israel (NIH/OD) Lyster, Peter (NIH/NIGMS) McGarvey, Bill (NIH/OD) Moore, Robert F. (NIH/OD) Myers, Louise (NIH/OD) Norvell, John (NIH/NIGMS) O'Connor, Judit (NIH/OD) Onken, James (NIH/NIGMS) Preusch, Peter (NIH/NIGMS) Schaffer, Walter (NIH/OD) Schwartz, Joan (NIH/OD) Sutton, Jennifer (NIH/OD) Suzman, Richard (NIH/NIA) Thakur, Neil (NIH/OD)