For several years now the evangelical movement has been bleeding young people. As this post from STR points out, there is hysteria out there, but there are good reasons to be concerned. STR cites several studies including one from my denomination, the Assemblies of God, which don’t look good. Even when they are averaged and taken conservatively, we may be losing about 50% of our young people after they leave high school. STR concludes:
It's safe to conclude the church is losing a significant portion of its young people for some period of time. Even if we take Barna's lower numbers and then cut 10% off to be extra conservative, we're still talking about losing half of our young people.
To some, the answer is the direction the emergent movement is going. A better answer is to look at youth and college ministry through different lenses and actually disciple these kids. Before they leave their families, familiar church surroundings and social networks, they need to be grounded in their relationships with Christ. A more detailed answer would be, well, much more detailed. Maybe you have some more thoughts.