By adopting wavelet coherence analysis, we follow Frankel’s (1986) commodity price overshooting model to study the dynamic covariation between the expected real interest rates and six agricultural commodities’ real returns over the period from 2000:1 to 2018:7. We find that US unconventional...

This study proposed a novel helical-fin-assisted micro-step Helix combustor to improve the performance of micro-combustors under high flow rates. The performance of the proposed Helix combustor and the conventional micro-step combustor was compared, and the effect of the helical fins on the flow...