🌱 Week 7 Homework — Feedback

🌱 Week 7 Homework — Feedback

Student: Sofia Bruga
Assignment: Solow Model with Technological & Population Growth

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✅ Overall Assessment

Result: ✅ More than 50% Correct

Good submission with correct helper function and proper parameter calibration. The plots are clear and include steady-state reference lines for capital. The main gaps are: (1) missing steady-state lines on the y/A plot, (2) figures saved in the root directory instead of Figures/, and (3) no printed steady-state summary. The interpretation is concise and accurate.

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🔍 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	⚠️	Re-runs function for second plot.
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 colored dashes.
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.
12	Save figures to Figures/ (PNG/PDF)	⚠️	Saves to root directory, not Figures/.
13	Provide steady-state summary (table or print)	✅	Prints k* and (y/A)* in loop.
14	Interpretation answers both homework questions	✅	Clear discussion of steady-state effects and convergence.
15	Code hygiene (comments, no cd, folder guard)	✅	Clean structure, no absolute paths.

Score: 11/15 tasks fully correct, 2/15 partial, 2/15 missing → ✅

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📈 Evidence & Highlights

23:35:docs/week7/Homework submissions/Homework7week_SofiaBruga Sofia Bruga/Homework7week.m k_star = (s / (delta + n + g + n*g))^(1 / (1 - alpha)); y_star = k_star^alpha; ... yline(k_star, '--', 'Color', colors{j}, 'HandleVisibility','off');

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💡 Suggestions for Improvement

1. 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.
2. Save figures to Figures/ directory: Create a Figures/ folder (with mkdir guard) and save both PNG files there using fullfile('Figures', 'filename.png').
3. Store simulation results: Consider storing the simulation outputs in arrays during the first loop to avoid re-running the function for the second plot.

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🧾 Summary

Well-implemented code with correct economics and helpful interpretation. Adding steady-state lines to the output plot and organizing figure exports into Figures/ will complete the submission.

Grade: ✅ (More than 50% correct)