Forms 8-K
1. Introduction A Form 8-K is the filing companies use when an event does not fit the timetable of the next scheduled report. A 10-Q or 10-K follows a reporting cycle. An 8-K follows a trigger. The trigger can be…
Sara Sardar
Data scientist with mathematical background and experience developing NLP systems that translate business needs into AI solutions. Sara Sardar is part of EdgarStat’s IT team.
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From Error Propagation to Newey-West Standard Errors
Ednaldo Silva’s blog post “Measurements and Uncertainties in Transfer Pricing” shows that uncertainty propagates through mathematical operations. This principle is directly relevant for econometric models in which variables are transformed, differenced, and estimated over time. Starting from error propagation, we…
Methodological expansion for “Debt-Driven GDP Growth”
Based on Ednaldo Silva’s LinkedIn post “Debt-Driven GDP Growth”, we examine the relationship between government debt and GDP growth. The analysis starts from a simple GDP identity, derives a structural equation for government spending, and transforms it into an empirical…
Addenda for “U.S. Surplus Growth is Debt-Fueled”
This analysis formalizes the argument presented in Ednaldo Silva's post "U.S. Surplus Growth is Debt-Fueled: Investment Stagnation is the Core Malaise."
Additional Steps to ECM and ARDL
Ednaldo Silva’s blog dated August 21, 2025, contains three sequential equations about the profit rate. My purpose is to demonstrate the connection between his logarithmic 2nd equation and the 3rd equation, referencing the ECM and ARDL econometric models. I used the same econometric reference he cited and adopted some notations of the textbook by Dimitrios Asteriou and Stephen Hall.