When exploring the logic why some economies grow faster than others, previous studies commonly assume that all economies follow a universal growth path. This paper explores the heterogeneity of growth regimes across economies and then investigates the decomposition bias of growth sources in traditional methods. Using a panel data of China's provinces, the empirical results show that a finite mixture model with three classes is best to describe the data, revealing that there are multiple growth regimes across provinces.Also, some provinces switch regimes over time while the others remain stable. Further, neglecting heterogeneous regimes overestimates the importance of factor endowment and underestimates the importance of sector productivity, while it does not greatly influence the importance of of factor market efficiency. In particular, the decomposition bias embodies in physical capital and energy input rather than labor. Our findings indicate that the existing literature may underestimate the contribution of sector productivity. Thus, it is critical to account for heterogeneous regimes when exploring the sources of economic growth. K E Y W O R D SChina, decomposition bias, finite mixture model, heterogeneous regimes J E L C L A S S I F I C A T I O NC33; O33; O47 692 | LIU et aL.

A sensitive DC magnetic field sensor is constructed by measuring the signal-to-noise ratio of an AC-modulated magnetic field at a particular frequency from an optical whispering gallery mode microcapillary resonator. The sensing element consists of an optical whispering gallery mode microcapillary resonator bonded to a magnetostrictive material that enables it to respond to external magnetic fields. A DC magnetic field sensitivity of 0.1703dB/Oe and a linear detection range from 4.8Oe to 65.7Oe are realized under an AC modulation field of 168.1kHz in the unshielded environment at room temperature. To our best knowledge, this sensitivity is about 2.3 times of the maximum sensitivity of other DC magnetic field sensors based on magnetic fluid or magnetostrictive material integrated fiber systems that use the dissipative sensing scheme. Furthermore, the sensor can operate at a stable temperature in the range of [-11∼45]°C, as long as the modulation frequency of the AC-modulation field is adjusted according to the ambient temperature. This sensor provides us with a novel DC magnetic field sensing scheme, which may play a role in industrial fields related to current and position detection in the future.

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