Theories of the Firm and their Value Creation Assumptions

Since Coase’s (1937) seminal paper on ‘The Nature of the Firm’, strategy scholars are invested in developing so-called ‘theories of the firm’ (ToFs). These are theories that should answer four questions on the nature of firms: Why do firms exist? Why are their boundaries as they are? Why are they organized the way they are? and Why are they so heterogeneous? In answering these questions, at least twenty ToFs have been put forward in the last decades. These include economics-based ToFs such as principal-agent theory and transaction-cost economics; organization theory-based ToFs such as behavioral theory and bureaucratic theory; and strategy-based ToFs such as the value-chain model and stakeholder theory. Assuming that all ToFs attempt to answer the four questions above, the question arises why we would need so many ToFs. Do we really need so many? And, if so, why? The extant literature provides a partial answer to this question by looking at complementarities between ToFs. Along that line, scholars have suggested to combine various ToFs (e.g., Coff, 1999; Foss & Foss, 2005; Pitelis, 2007). However, as these suggestions typically concern the combination of two or of three ToFs, they do not account for the fact that we have at least twenty now. Also more comprehensive reviews (e.g., Conner, 1991; Foss, 1993; Madhok, 2002) do not explain the multitude of ToFs in our literature. To find an answer to this question, this paper provides a two-step comparison of ToFs. The first step is a bird’s eye view comparison of eighteen well-known ToFs along some apparent differences. This step reveals differences between some ToFs, but it also leaves a group of ToFs that are apparently similar. In the second step we further compare this group of ToFs on their more implicit assumptions. Based on this two-step comparison, we conclude that we do indeed need a variety of ToF. The reason is that the various ToFs have different assumptions on how firms create value and from which sources this value is derived. Since firms in practice also differ in the way they create value, our conclusion is that we need more than one ToF to explain this variety. The implication is that scholars engaged in the ToF debate may want to put firm value creation center stage. This, we shall argue, requires adding a fifth question to the ToF that precedes the other four questions: what value does a firm create

Targeting BRAF-mutant tumours with TGFBR1 inhibitors

No abstract available

Edith T. Penrose: Economist of "The Ordinary Business of Life"

When Edith T. Penrose became Fritz Machlup’s student in the late-1940s, she found little in mainstream or Austrian economics to guide her as she began her explorations into the growth of the firm. While she acknowledged Kenneth Boulding’s influence on her work, we suspect she drew on a broader tradition that includes, among others, Alfred Marshall, Frank Knight (Boulding’s teacher), and Ronald Coase. We seek to demonstrate Penrose’s connection to this ‘invisible college’, particularly to Knight, and its influence on her investigation of the growth of the firm. Given mainstream economists’ pursuit of rigor at the expense of practical relevance and their continuing inattention to Coase’s work, we suggest Penrose’s work on the growth of the firm can be understood as part of a broader tradition represented by this ‘invisible college’, leading to useful new insights for business strategy and business ethics scholarship

Transforming growth factor- directly induces p53-up-regulated modulator of apoptosis (PUMA) during the rapid induction of apoptosis in myc-driven B-cell lymphomas

Background: TGF-β induces apoptosis in Burkitt's lymphoma cells. Results: PUMA is a direct target gene of TGF-β signaling and is required for rapid apoptosis. Conclusion: TGF-β-mediated direct induction of PUMA contributes to apoptosis in human and murine c-Myc-driven lymphomas. Significance: These studies link TGF-β signaling and transcriptional activation of PUMA, two factors with critical roles in regulating B-cell survival

Discourse and identity in a corpus of lesbian erotica

This article uses corpus linguistic methodologies to explore representations of lesbian desires and identities in a corpus of lesbian erotica from the 1980s and 1990s. We provide a critical examination of the ways in which “lesbian gender,” power, and desire are represented, (re-)produced, and enacted, often in ways that challenge hegemonic discourses of gender and sexuality. By examining word frequencies and collocations, we critically analyze some of the themes, processes, and patterns of representation in the texts. Although rooted in linguistics, we hope this article provides an accessible, interdisciplinary, and timely contribution toward developing understandings of discursive practices surrounding gender and sexuality

Preclinical Evaluation of AZ12601011 and AZ12799734, Inhibitors of Transforming Growth Factor β Superfamily Type 1 Receptors.

The transforming growth factor β (TGFβ) superfamily includes TGFβ, activins, inhibins, and bone morphogenetic proteins (BMPs). These extracellular ligands have essential roles in normal tissue homeostasis by coordinately regulating cell proliferation, differentiation, and migration. Aberrant signaling of superfamily members, however, is associated with fibrosis as well as tumorigenesis, cancer progression, metastasis, and drug-resistance mechanisms in a variety of cancer subtypes. Given their involvement in human disease, the identification of novel selective inhibitors of TGFβ superfamily receptors is an attractive therapeutic approach. Seven mammalian type 1 receptors have been identified that have context-specific roles depending on the ligand and the complex formation with the type 2 receptor. Here, we characterize the biologic effects of two transforming growth factor β receptor 1 (TGFBR1) kinase inhibitors designed to target TGFβ signaling. AZ12601011 [2-(2-pyridinyl)-4-(1H-pyrrolo[3,2-c]pyridin-1-yl)-6,7-dihydro-5H-cyclopenta[d]pyrimidine]; structure previously undisclosed] and AZ12799734 [4-({4-[(2,6-dimethyl-3-pyridinyl)oxy]-2-pyridinyl}amino)benzenesulfonamide] (IC50 = 18 and 47 nM, respectively) were more effective inhibitors of TGFβ-induced reporter activity than SB-431542 [4-[4-(1,3-benzodioxol-5-yl)-5-(2-pyridinyl)-1H-imidazol-2-yl]benzamide] (IC50 = 84 nM) and LY2157299 [4-[2-(6-methylpyridin-2-yl)-5,6-dihydro-4H-pyrrolo[1,2-b]pyrazol-3-yl]quinoline-6-carboxamide monohydrate]] (galunisertib) (IC50 = 380 nM). AZ12601011 inhibited phosphorylation of SMAD2 via the type 1 receptors activin A receptor type 1B (ALK4), TGFBR1, and activin A receptor type 1C (ALK7). AZ12799734, however, is a pan TGF/BMP inhibitor, inhibiting receptor-mediated phosphorylation of SMAD1 by activin A receptor type 1L, bone morphogenetic protein receptor type 1A, and bone morphogenetic protein receptor type 1B and phosphorylation of SMAD2 by ALK4, TGFBR1, and ALK7. AZ12601011 was highly effective at inhibiting basal and TGFβ-induced migration of HaCaT keratinocytes and, furthermore, inhibited tumor growth and metastasis to the lungs in a 4T1 syngeneic orthotopic mammary tumor model. These inhibitors provide new reagents for investigating in vitro and in vivo pathogenic processes and the contribution of TGFβ- and BMP-regulated signaling pathways to disease states

Business models: A challenging agenda

Most research on business models lies in the literature on strategy and competitive advantage and focuses on their role as descriptors of actual phenomenon, often by reference to taxonomic categories. In this article, we explore how business models can be seen as a set of cognitive configurations that can be manipulable in the minds of managers (and academics). By proposing a typology of business models that emphasizes the connecting of traditional value chain descriptors with how customers are identified and satisfied, and how the firm monetizes its value, we explore how business model configurations can extend current work on cognitive categorization and open up new possibilities for organization research

The theory of international business: the role of economic models

This paper reviews the scope for economic modelling in international business studies. It argues for multi-level theory based on classic internalisation theory. It present a systems approach that encompasses both firm-level and industry-level analysis

Anisotropic Colossal Magnetoresistance Effects in Fe_{1-x}Cu_xCr_2S_4

A detailed study of the electronic transport and magnetic properties of Fe$_{1-x}$Cu$_x$Cr$_2$S$_4$ ($x \leq 0.5$) on single crystals is presented. The resistivity is investigated for $2 \leq T \leq 300$ K in magnetic fields up to 14 Tesla and under hydrostatic pressure up to 16 kbar. In addition magnetization and ferromagnetic resonance (FMR) measurements were performed. FMR and magnetization data reveal a pronounced magnetic anisotropy, which develops below the Curie temperature, $T_{\mathrm{C}}$, and increases strongly towards lower temperatures. Increasing the Cu concentration reduces this effect. At temperatures below 35 K the magnetoresistance, $MR = \frac{\rho(0) - \rho(H)}{\rho(0)}$, exhibits a strong dependence on the direction of the magnetic field, probably due to an enhanced anisotropy. Applying the field along the hard axis leads to a change of sign and a strong increase of the absolute value of the magnetoresistance. On the other hand the magnetoresistance remains positive down to lower temperatures, exhibiting a smeared out maximum with the magnetic field applied along the easy axis. The results are discussed in the ionic picture using a triple-exchange model for electron hopping as well as a half-metal utilizing a band picture.Comment: some typos correcte