My theory: small countries have single-center-syndrome: they can (either through some economic or cultural reason) only support one major center, their capital

My theory: small countries have single-center-syndrome: they can (either through some economic or cultural reason) only support one major center, their capital region. Their (thought to be) to small for multiple centers. This drives up prices in the capital region, because people can't conceive and consequently don't create secondary centers to avoid the issue of land value.