随机贴现因子

def solve(consumption_growth, beta, gamma):
    import numpy as np
    sdf = [beta * g ** (-gamma) for g in consumption_growth]
    return {"消费增长率": consumption_growth, "随机贴现因子": [round(s, 4) for s in sdf], "SDF均值": round(np.mean(sdf), 4), "SDF标准差": round(np.std(sdf), 4)}