i found 2019 PhD thesis on hiragana-katakana usage https://t.co/ye3jPvmIwT if this is cutting-edge, lack of discussion on historical change and variance by social position of writer suggests no such research has been done formally.
社会学の研究を一つ紹介すると、例えば龍谷大学の津島教授が欧州の国際調査"Survey on Women's Well-being and Safety in Europe"の日本版を作るという手堅い手法で、性犯罪やDVの基準を欧州とそろえていわゆる「暗数」の推定をやった研究があるのだけど、
https://t.co/BeqxK282ht