Carra wrote in the Telegraph: "After Euro 96 I recall everyone saying we had to copy the Ajax Academy. Two years later the obsession was Clairefontaine in France.
"Now it is La Masia in Barcelona. Sometimes, a country has its moment and in recent years it has been Spain, but that does not mean it can be replicated in another country. You have to assess how the game is evolving and act accordingly or you are always years behind.
"The real reference for English football is Germany, because we produce players of similar strength, power and organisation.
"Where they are far superior is in technical excellence. I see no reason why our future generations cannot be nurtured in the same way. Germany responded to their failure in 2004 by focusing on their youth centres and the result is there to see now."