福利经济学定理

def solve(____):
    a1, b1, a2, b2 = preferences
    x1, y1 = allocation[____]
    x2, y2 = allocation[____]
    mrs1 = (____) * (____)
    mrs2 = (____) * (____)
    pareto_optimal = abs(____) < ____
    theorem1 = "____" if pareto_optimal else "____"
    theorem2 = "____"
    return {"____": allocation, "____": round(____), "____": round(____), "____": pareto_optimal, "____": theorem1, "____": theorem2}