鲜为人知的经济理论用英语怎么说？

鲜为人知的经济理论

arcane economic theories

arcane

adj. 秘密的，神秘的，晦涩难解的；

例句
Until a few months ago few people outside the arcane world of contemporary music had heard of Gorecki.
直至几个月前，在现代音乐神秘殿堂之外很少有人听说了戈莱斯基。

economic

adj. 经济的，经济学的，合算的，有经济效益的；

例句
He's already altered several of the proposals in his economic plan to accommodate demands of special interests.
他已经改动了经济计划中的几项提议以迁就特殊利益集团的要求。

theories

n. 学说( theory的名词复数 )，理论，原理，意见；

例句
Many theories have been advanced as to why some women suffer from depression...
就一些女性患抑郁症的原因，各种说法纷至沓来。