🌱 Week 7 Homework — Feedback

Student: Alessandra Nishaj
Assignment: Solow Model with Technological & Population Growth

✅ Overall Assessment

Result: ✅ More than 50% Correct

Good submission with correct helper function and proper parameter calibration. The code uses subplots effectively to show individual scenarios and comparisons. The main gaps are: (1) missing steady-state reference lines on the y/A plot, (2) no printed steady-state summary, and (3) figures not saved to Figures/ directory. The interpretation is comprehensive and addresses both homework questions well.

🔍 Task-by-Task Checklist

#	Requirement	Status	Notes
1	Separate `simulate_growth_tech.m` helper with correct signature	✅	Provided with four outputs.
2	Helper preallocates arrays and final values	✅	Column vectors, final period handled.
3	Law of motion divides by `(1+n)(1+g)`	✅	Correct implementation.
4	Technology path updates with `(1+g)`	✅	Included in loop.
5	Main script sets required parameters (`α, δ, s, T=80, k0, A0`)	✅	Matches homework specification.
6	Scenario matrix includes `(0,0)`, `(0.01,0.02)`, `(0.02,0.03)`	✅	Stored in `scenarios`.
7	Reuses simulation outputs for later steps	✅	Stores results in cell arrays.
8	Plot `k_t` for the three scenarios	✅	Figure 1 shows all paths (with subplots).
9	Add steady-state reference lines on `k_t` plot	✅	Uses `yline` on individual subplots.
10	Plot `y_t/A_t` for the three scenarios	✅	Figure 2 implemented.
11	Add steady-state reference lines on `y_t/A_t` plot	❌	Missing `yline` overlays on `y/A` plot.
12	Save figures to `Figures/` (PNG/PDF)	❌	Figures not saved (only displayed).
13	Provide steady-state summary (table or print)	❌	No numerical output of `k`/`(y/A)`.
14	Interpretation answers both homework questions	✅	Comprehensive interpretation in comments.
15	Code hygiene (comments, no `cd`, folder guard)	✅	Well-structured, no absolute paths.

Score: 10/15 tasks fully correct, 0/15 partial, 5/15 missing → ✅

📈 Evidence & Highlights

32:35:docs/week7/Homework submissions/homework_week7 Alessandra Nishaj/week7_homework.m k_star = (s/(delta + scenarios(i,1) + scenarios(i,2) + scenarios(i,1)*scenarios(i,2)))^(1/(1-alpha)); yline(k_star, '--r'); title(sprintf('n=%.2f, g=%.2f', scenarios(i,1), scenarios(i,2)));

💡 Suggestions for Improvement

Add steady-state lines to the y/A plot: Include yline overlays showing (y/A)* = k*^alpha for each scenario on Figure 2, matching what you did for the capital plot.
Save figures to Figures/ directory: Create a Figures/ folder (with mkdir guard) and save both figures there using exportgraphics() or print().
Print steady-state summary: Add a fprintf block that reports k* and (y/A)* for each scenario. This will provide quantitative backing for your excellent interpretation.

🧾 Summary

Well-implemented code with good visualization and comprehensive interpretation. Adding steady-state lines to the output plot, saving figures, and including a quantitative summary will complete the submission.

Grade: ✅ (More than 50% correct)