Time Series Econometrics Using Microfit 5.pdf May 2026
D(LAGOS_CONSUMPTION) = 0.15 * D(LONDON_REMITTANCES) - 0.32 * ECT(-1) (short-run) (adjustment speed) That -0.32 was gold. It meant that 32% of any disequilibrium from last quarter was corrected this quarter. Shocks faded in about three quarters. But why was Lagos consumption not rising? She saw the answer: the short-run coefficient (0.15) was much smaller than the long-run (0.86). Remittances boosted consumption weakly in the short term—people saved or paid debt first. The PDF’s footnote warned: "Policy based on long-run elasticities alone is blind to liquidity traps." To convince policymakers, Aliyah needed a story. She turned to Impulse Response Functions (IRFs) .
Aliyah smiled. "Short-term: strengthen remittance channels. Long-term: break the cointegration by building local savings instruments. The ECM shows you have three quarters to act before a remittance shock becomes a consumption crisis." Time series econometrics using Microfit 5.pdf
Dr. Aliyah Khan was an applied econometrician—a data detective. Her latest case was the "Lagos–London Remittance Puzzle." For five years, official data showed a puzzling disconnect: Nigerian GDP was growing, but household consumption in Lagos was flatlining. The reason, she suspected, lay in the time series properties of her variables. But standard regression was like using a stethoscope on a jet engine. She needed precision. She needed memory. She needed Microfit 5 . D(LAGOS_CONSUMPTION) = 0
She first-differenced the non-stationary variables (Microfit 5 → Generate → d(x) ). Now, D(LAGOS_CONSUMPTION) and D(LONDON_REMITTANCES) became stationary. But she had lost the long-run relationship. For that, she needed Chapter 2. Chapter 2: The Long-Run Marriage (Cointegration) The PDF’s most dog-eared section was on Cointegration . "If two non-stationary series move together over time," it read, "their linear combination might be stationary. That is cointegration." But why was Lagos consumption not rising
