Feb
1
"I don't wanna grow up": Age / value relationships for football players
Let's get back to the age-value relationship from my last post. I did some more plotting to see on which position this inversed U-shaped relationship is strongest. Please note, that I use a dataframe called eu.players throughout this post, which holds downloaded football player information from transfermarkt.de.
But first, let us get back to the original graph.
(click to enlarge)
As you can see, very young players are not worth a lot of money, then the quadratic function peaks at 26 years (I limited the y-axis because very worthy players would cause the plot to be unreadable). Then it falls off again. The dashed line in the plot is regression line from a simple linear regression model I introduced in my last post.
But first, let us get back to the original graph.
(click to enlarge)
As you can see, very young players are not worth a lot of money, then the quadratic function peaks at 26 years (I limited the y-axis because very worthy players would cause the plot to be unreadable). Then it falls off again. The dashed line in the plot is regression line from a simple linear regression model I introduced in my last post.
