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      <img src="../logo.png" class="logo" alt=""><h1>Time Varying Effects</h1>
                        <h4 data-toc-skip class="author">Dimitris
Rizopoulos</h4>
            
            <h4 data-toc-skip class="date">2025-08-23</h4>
      
      <small class="dont-index">Source: <a href="https://git