Effectiveness of Internal Control, Financing Constraints and Corporate Value

Internal control plays an important role in corporate governance, and it will have an important impact on enterprise value. This paper chooses 16362 samples from 2009 to 2016 in Shanghai and Shenzhen as the research object, discusses the influence mechanism of the effectiveness of internal control on the enterprise value, and explores the effect path of the effectiveness of internal control on enterprise value from the perspective of financing constraints. The results show that: first, the effectiveness of internal control contributes to the value creation of enterprises, after using 3SLS and fixed effects model to control possible endogeneity problems, the conclusions are still robust; second, financing constraints are effective paths for the effectiveness of internal control to influence enterprise value. The effectiveness of internal control can help enterprises achieve value growth by easing the financing constraints of enterprises. This paper enriches the theory of the internal control of the economic consequences, reveals the governance effectiveness of financing constraints in the effectiveness of internal control ,and provides useful inspiration for promoting China's internal control construction. Keywords: Effectiveness of Internal Control, Enterprise Value, Financing Constraints, Function Path

Research on the Effectiveness of Internal Control: Empirical Evidence from Emerging Markets

Effective internal control can reduce the risk of enterprises, and help enterprises to enhance their value. Many scholars at home and abroad have carried out research on the internal control, but there are still many deficiencies in the evaluation of the effectiveness of internal control. This paper is based on the emerging market assets, to Chinese listed companies as the research object, on the basis of the theory of literature, rules and regulations and management practices on the construction of the internal control effectiveness evaluation index system of listed companies, the group G1 weighting method combining with the variation coefficient method, determine the weight of each index, construct the listed company's internal control effectiveness evaluation model. This lays a solid foundation for the follow-up research, and has important theoretical value and practical significance for promoting the effectiveness of internal control. Keywords: Effectiveness of Internal Control, Comprehensive Evaluation,Grop-G1 Method, Coefficient Variation Metho

Chiral and nodal superconductors in t-J model with valley contrasting flux on triangular moir\'e lattice

Recent experimental progresses have made it possible to simulate spin 1/2 Hubbard model on triangular lattice in moir\'e materials formed by transition metal dichalcogenide (TMD) heterobilayer or homobilayer. In twisted TMD homobilayer, a vertical electric field can induce a valley contrasting flux in the hopping term. In this paper we study possible superconductors from a t-J model with valley contrasting flux $\Phi$ using the slave boson mean field theory. We obtain a phase diagram with doping $x$ and $\Phi$. A finite $\Phi$ breaks spin rotation symmetry and the pairing symmetry is a superposition of spin singlet $d-id$ and spin triplet $p+ip$. There are two topological phase transitions when tuning $\Phi$ from $0$ to $\pi$, with three Dirac nodes at one transition and one single Dirac node at the other transition. We also discuss the effects of van Hove singularity and a three-site correlated hopping term on the pairing strength. Lastly, we demonstrate that a small anisotropy term breaking the $C_3$ rotation can lead to a time reversal invariant nodal superconductor connected to the $d_{x^2-y^2}$ superconductor on square lattice

Approximate SU(4) spin models on triangular and honeycomb lattices in twisted AB-Stacked WSe2_2 homo-bilayer

In this paper, we derive lattice models for the narrow moir\'e bands of the AB-stacked twisted WSe$_2$ homobilayer through continuum model and Wannier orbital construction. Previous work has shown that an approximate SU(4) Hubbard model may be realized by combining spin and layer because inter-layer tunneling is suppressed due to spin $S_z$ conservation. However, Rashba spin-orbit coupling (SOC) was ignored in the previous analysis. Here, we show that a Rashba SOC of reasonable magnitude can induce a finite but very small inter-layer hopping in the final lattice Hubbard model. At total filling $n=1$, we derive a spin-layer model on a triangular lattice in the large-U limit where the inter-layer tunneling contributes as a sublattice-dependent transverse Ising field for the layer pseudospin. We then show that the $n=2$ Mott insulator is also captured by an approximate SU(4) spin model, but now on honeycomb lattice. We comment on the possibility of a Dirac spin liquid (DSL) and competing phases due to SU(4) anisotropy terms