Ribosomal protein L11 has two domains: the C-terminal domain (L11-C76) binds rRNA, whereas the N-terminal domain (L11-NTD) may variously interact with elongation factor G, the antibiotic thiostrepton, and rRNA. To begin to quantitate these interactions, L11 from Bacillus stearothermophilus has been overexpressed and its properties compared with those of L11-C76 alone in a fluorescence assay for...

The Grain-for-Green Project (GFGP), one of the largest ecological restoration projects in China, has made a significant contribution to carbon neutrality. However, quantitative climate change and driving forces sequestration retired farmlands remains unclear. To analyze dynamics their forces, GlobeLand30 databases were used identify from 2001 2020; addition, net primary productivity (NPP) ident...

Loss Leading pricing is often referred to as an advertising strategy which allows retailers to attract consumers by subsidizing some products and make profits from other items; in this way, below-cost pricing may improve consumer welfare by compensating consumers for their lack of information. This paper shows that large retailers can instead use loss leading as an exploitative device at the de...

While several plots of the aggregate age distribution suggest that firm age is exponentially distributed, we find some departures from the exponential benchmark. At the lower tail, we find that very young establishments are more numerous than expected, but they face high exit hazards. At the upper tail, the oldest firms are older than the exponential would have predicted. Furthermore, the age d...

We analyse congestion pricing in a road and rail network, where the two modes are imperfect substitutes. On the road there is bottleneck congestion; in each train there is crowding congestion. We model two dimensions of preference heterogeneity; these two dimensions have opposite effects on the welfare impact of congestion pricing and lead to different distributional effects. The distributional...

In our paper targets, by setting a reserve price, screen acquirers on their (expected) ability to generate merger-specific synergies. Both empirical evidence and many common merger models suggest that the difference between highand low-synergy mergers becomes smaller during booms. This implies that the target’s opportunity cost for sorting out relatively less fitting acquirers increases and, he...

We study the exit of hospitals from the market for inpatient services. More generous hospital reimbursement significantly reduces the probability of exit throughout the 1990s. Conditional on reimbursement levels, hospital efficiency was not a significant determinant in the early 1990s but in the midto late 1990s, less efficient hospitals were significantly more likely to exit. Throughout the pe...

This paper analyzes competitive pricing policies by multiproduct firms facing heterogeneous buying patterns. We show that cross-subsidization arises when firms have comparative advantages on different products but are equally efficient overall: Firms earn a profit from multi-stop shoppers by charging positive margins on their strong products but, as price competition for one-stop shoppers drive...

I study the implications of exclusive contracts for smartphones. Theory models indicate that lower demand elasticities for handsets relative to wireless networks could lead to exclusive contracts maximizing joint profits of the contracting parties. I estimate smartphone and carrier demand on a detailed monthly market-level dataset of US consumer decisions over 2008-2010. Counterfactual simulati...

In many competitive settings consumers buy multiple product categories, and some prefer to use a single firm, generating complementary cross-category price effects. To study pricing in supermarkets, an organizational form where these effects are internalized, we develop a multi-category multi-seller demand model and estimate it using UK consumer data. This class of model is used widely in theor...