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  "n_firms": 497,
  "yrs": "2010-2024",
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      "Q3": 0.1907,
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      "Q3": 0.1621,
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      "n_years": 15.0
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        "CMA": -0.054,
        "MOM": -0.061
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        "HML": -0.13,
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        "CMA": -0.054,
        "MOM": -0.048
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      "r2_within": 0.0
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      "n": 6811,
      "r2_within": 0.0737
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    "M4_risk_ctrl": {
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          "p": 0.2149
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        "mean_coef": 0.1848,
        "t": 11.94
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      "z_AI_ADOPT": {
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        "t": 1.63
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      "z_size": {
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        "t": -8.53
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      "z_mom": {
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        "t": 1.04
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      "z_vol": {
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        "t": 3.63
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      "n_years": 15
    },
    "infra": {
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        "mean_coef": 0.1848,
        "t": 11.94
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      "z_AI_INFRA": {
        "mean_coef": 0.016,
        "t": 1.71
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      "z_size": {
        "mean_coef": -0.0333,
        "t": -8.2
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      "z_mom": {
        "mean_coef": 0.0069,
        "t": 0.93
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      "z_vol": {
        "mean_coef": 0.0685,
        "t": 3.59
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      "n_years": 15
    },
    "all": {
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        "mean_coef": 0.1848,
        "t": 11.95
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      "z_AI_ADOPT": {
        "mean_coef": -0.0,
        "t": -0.0
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      "z_AI_INFRA": {
        "mean_coef": 0.0158,
        "t": 1.54
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      "z_AI_RISK": {
        "mean_coef": 0.0001,
        "t": 0.01
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      "z_size": {
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        "t": -8.21
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      "z_mom": {
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        "t": 1.08
      },
      "z_vol": {
        "mean_coef": 0.0687,
        "t": 3.56
      },
      "n_years": 15
    }
  },
  "structural_break": {
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      "pre_slope": 0.0074,
      "interaction": 0.0199,
      "interaction_t": 1.17,
      "post_slope": 0.0273
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      "interaction": 0.0277,
      "interaction_t": 2.63,
      "post_slope": 0.0344
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      "interaction": 0.027,
      "interaction_t": 1.78,
      "post_slope": 0.0348
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  "subperiod_spread": {
    "AI_ADOPT": {
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        2.04,
        12
      ],
      "post_2022_2024": [
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        2.15,
        3
      ]
    },
    "AI_INFRA": {
      "pre_2010_2021": [
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        12
      ],
      "post_2022_2024": [
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        3
      ]
    },
    "AI_COMPOS": {
      "pre_2010_2021": [
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        1.58,
        12
      ],
      "post_2022_2024": [
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        2.07,
        3
      ]
    }
  }
}