There's evidence it could be regional. This would not surprise me given the differences in public social safety nets. https://www.researchgate.net/publication/

There's evidence it could be regional. This would not surprise me given the differences in public social safety nets. https://www.researchgate.net/publication/4840766_Unions_and_Innovation_A_Survey_of_the_Theory_and_Empirical_Evidence https://www.researchgate.net/publication/4840766_Unions_and_...