🌱 Week 7 Homework — Feedback

Student: Giovanni Di Miele
Assignment: Solow Model with Technological & Population Growth

✅ Overall Assessment

Result: ✅ More than 50% Correct

Excellent submission with complete implementation. The helper function is correctly used, all scenarios are simulated and stored efficiently, and both plots include steady-state reference lines. The code is well-organized with proper preallocation and clear structure. The only minor issue is that figures are saved to the root directory instead of Figures/. The interpretation is concise but addresses both homework questions.

🔍 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 `cases`.
7	Reuses simulation outputs for later steps	✅	Stores results in cell arrays (`K_all`, `yA_all`).
8	Plot `k_t` for the three scenarios	✅	Figure 1 shows all paths.
9	Add steady-state reference lines on `k_t` plot	✅	Uses `yline` with labels.
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	✅	Uses `yline` with labels.
12	Save figures to `Figures/` (PNG/PDF)	⚠️	Saves to root directory, not `Figures/`.
13	Provide steady-state summary (table or print)	⚠️	Steady states calculated but not printed.
14	Interpretation answers both homework questions	✅	Clear discussion of steady-state and convergence.
15	Code hygiene (comments, no `cd`, folder guard)	✅	Well-structured, no absolute paths.

Score: 13/15 tasks fully correct, 2/15 partial → ✅

📈 Evidence & Highlights

49:51:docs/week7/Homework submissions/week7_hw_sol Giovanni Di Miele/week7_homework.m for j = 1:size(cases,1) yline(kstars(j), '--', sprintf('k* (%s)', labels{j})); end ... for j = 1:size(cases,1) yline(yAstars(j), '--', sprintf('(y/A)* (%s)', labels{j})); end

💡 Suggestions for Improvement

Save figures to Figures/ directory: Use fullfile('Figures', 'kt.png') instead of saving directly to the root directory. This keeps the workspace organized and matches homework expectations.
Print steady-state summary: Add a fprintf block that reports k* and (y/A)* for each scenario. You already calculate these values (kstars, yAstars), so just print them.

🧾 Summary

Outstanding submission with complete implementation, proper steady-state overlays, and clear interpretation. Moving figure exports to Figures/ and adding a printed summary are the only remaining polish items.

Grade: ✅ (More than 50% correct)