But they are the ones who set the dues - and what looks reasonable to them is often enough to keep ordinary Jews out of the temple, and their kids without a Jewish education. But this needs to be done together - any temple that did this on its own would lose its richest members to other temples that kept the current system. Egon Mayer has done much research on the issue of intermarriage, and the figures he quotes support this claim. And this only refers to how the children are raised, and not how they identify as adults. Probably an even smaller percentage identify as Jews as adults.
Most intermarriages are of the latter kind.
Rarely are the children raised Jewish in this case. The results seem to be mixed in the case of conversionary marriages. Mayer indicates little difference between these children and those who have two born-Jewish parents, but Foster and Tabachnik indicate that these children are less encouraged to find Jewish spouses and choose Judaism as their religion. Intermarriage I understand the pain and disappointment expressed in recent postings about intermarriage of close relatives. I believe that the most critical task facing Jewish institutions in America, as they relate to the continuance of Judaism is the renewal emphasis on Jewish religious and spiritual life, as opposed to cultural life.