ImpactMojo ImpactMojo
Membership

Research design worksheet

Planning rigorous impact evaluations for development programs

How to use this worksheet

This worksheet guides you through designing a credible impact evaluation from start to finish. Work through each section systematically, building your research design step by step. The completed worksheet will serve as your evaluation blueprint.

Best Practices:

1 Program and research question definition

Program description

Describe the development program or intervention you want to evaluate:

Primary research question

State your main causal question clearly and specifically:

Theory of change

Map out the causal pathway from intervention to outcomes:

Policy relevance

Why does this question matter for policy and practice?

2 Outcome measurement strategy

Primary outcomes

List 1-3 most important outcomes and how you'll measure them:

Secondary outcomes

Additional outcomes of interest (spillovers, unintended effects, mechanisms):
Outcome quality checklist

3 Identification strategy selection

Assignment mechanism

How are participants selected for the program?
Randomized trial

Random assignment to treatment

Instrumental variables

Valid instrument available

Difference-in-differences

Policy change over time

Regression discontinuity

Threshold-based assignment

Matching/regression

Selection on observables

Method justification

Why is your chosen method the most credible for this context?

Key identifying assumption

State the critical assumption needed for causal interpretation:

4 Threats to validity assessment

Selection bias
How might treated and control groups differ systematically?
Spillover effects
Could treatment affect control group outcomes?
Attrition/missing data
Who might drop out and why?
External validity
How generalizable are results?

Mitigation strategies

How will you address the highest-threat validity concerns?

5 Sample size and power analysis

Minimum Detectable Effect (MDE)

What's the smallest effect size that would be policy-relevant?

Power calculation parameters

Fill in your power analysis assumptions:
Parameter Value Justification
Power (1-β) ____ Typically 0.80 or 0.90
Significance (α) ____ Usually 0.05
Baseline Mean ____ From pilot data or literature
Baseline SD ____ From pilot data or literature
R² (covariates) ____ Variance explained by controls

Required sample size

Based on power calculation:
Power analysis tips
  • Use conservative assumptions: err on the side of larger samples
  • Account for clustering if randomization is at group level
  • Adjust for expected attrition rates
  • Consider multiple hypothesis testing if many outcomes
  • Use pilot data or similar studies for parameter estimates

6 Data collection strategy

Baseline data collection

When and how will you collect pre-treatment data?

Follow-up timeline

When will you measure outcomes?
Time Point Timing After Treatment Key Outcomes Rationale
Baseline Before treatment All baseline variables Control for pre-treatment differences
Follow-up 1 ____ ____ ____
Follow-up 2 ____ ____ ____

Data sources

What data will you collect and from where?
Data quality checklist

7 Analysis plan

Primary specification

Write out your main regression equation:

Control variables

What variables will you include and why?

Robustness checks

How will you test the sensitivity of your results?

Heterogeneity analysis

For which subgroups might effects differ?
Pre-registration requirements

Complete and register your analysis plan BEFORE seeing any outcome data. This prevents data mining and ensures credible results. Include:

  • Primary and secondary outcome definitions
  • Exact specification for main analysis
  • Predetermined subgroup analyses
  • Multiple testing corrections

8 Implementation and timeline

Project timeline

Map out key milestones:
Phase Duration Key Activities Deliverables
Design & Setup ____ IRB approval, instrument development Pre-analysis plan
Baseline ____ Data collection, randomization Baseline report
Implementation ____ Program rollout, monitoring Implementation report
Follow-up ____ Endline data collection Clean dataset
Analysis ____ Statistical analysis, report writing Final report

Budget estimation

Major cost categories and estimates:

Risk management

What could go wrong and how will you address it?

Stakeholder engagement

How will you involve implementers and policymakers?

9 Final quality check

Design quality assessment

Overall design assessment

Summarize the strengths and limitations of your design:

Dissemination plan

How will you share results with relevant audiences?
Additional resources