The World Bank has put together a very informative collection of papers and websites on corruption at this web page. They define corruption as “theft of public resources for private gain”, and they define and evaluate the various costs associated with corruption.

They name two in the summary: one is redistributive, and is incurred when businesses with political power abuse that privilege to get a contract at the expense of their competitors, and the other is a welfare cost, which is to the overall economy, and thus makes everyone worse off.

The papers and websites are all free to access, and the language is surprisingly clear-cut and demonstrative. This is a really good resource, and I encourage you to take advantage of it. Here is the link to it.