Review changes in enterprise outcomes after assistance.
Inputs, example and sources
World Bank · Impact Evaluation in Practice Second Edition
Institution publication · Chapter 7, table 7.2, printed page 140, PDF page 170
The formula is verified. Causal interpretation still requires a defensible study design, comparison and assumptions.
Keep the same place, observation period, definitions, units and source versions.
Analysis inputs. Treatment Real enterprise sales on stated price basis before [LKR]; Treatment Real enterprise sales on stated price basis after [LKR]; Comparison Real enterprise sales on stated price basis before [LKR]; Comparison Real enterprise sales on stated price basis after [LKR]; Study design and comparability evidence; Outcome definition, method and reference basis
Other required evidence. Baseline sales; follow-up sales; employment; costs; comparison firms; external factors.
Fictional worked example · 2025
Laggala Pallegama — business performance · Laggala Pallegama
| Input or result | Value | Unit |
|---|
| Treatment Real enterprise sales on stated price basis before | 420,000 | LKR |
| Treatment Real enterprise sales on stated price basis after | 590,000 | LKR |
| Comparison Real enterprise sales on stated price basis before | 390,000 | LKR |
| Comparison Real enterprise sales on stated price basis after | 460,000 | LKR |
| Study design and comparability evidence | Missing | |
| Outcome definition, method and reference basis | Real enterprise sales on stated price basis /example matching definition1 | |
| Difference in changes | 100,000 | LKR |
|---|
The arithmetic alone does not establish causation. Design, parallel trends, confounding, attrition, uncertainty and adverse effects need appropriate evidence.
Proposed checking role. Enterprise development adviser and finance/monitoring reviewer.
After the action. Verified outcomes, costs, distributional effects and evidence strength.
- World Bank Impact Evaluation in Practice Second Edition — Institution publication. Chapter7 difference-in-differences. Published difference-in-differences estimator and study assumptions; aggregate examples do not establish causation.
- SHARED domain decision contracts — Validation required. Domain decision rules and matching fictional examples. Local comparisons, constraints, source matching, sorting and follow-up proposals; developer checks do not establish scientific or client approval.
Institution and data context
- National Enterprise Development Authority — Government publication. Full method locator not established. Institutional context; does not establish the calculation or local approval.
- Cost of production budgeting — Institution publication. Generic landing page; the intended budgeting guide is not established. Institutional context; does not establish the calculation or local approval.
- OECD evaluation criteria — Institution publication. Understanding the six criteria: definitions and elements for analysis. Institutional context; does not establish the calculation or local approval.
Confirm local scope, data rights, parameters and responsible roles in this Institution review. Published components retain their source; they do not approve the local application.