A literature-based taxonomic catalogue of the nemertean species (Phylum Nemertea) reported from Japanese waters is provided, listing 19 families, 45 genera, and 120 species as valid. Applications of the following species names to forms previously recorded from Japanese waters are regarded as uncertain: Amphiporus cervicalis, Amphiporus depressus, Amphiporus lactifloreus, Cephalothrix filiformis...

This paper argues that unemployment insurance increases labor productivity by encouraging workers to seek higher productivity jobs, and by encouraging firms to create those jobs. We use a quantitative model to investigate whether this effect is comparable in magnitude to the standard moral hazard effects of unemployment insurance. Our model economy captures the behavior of the U.S. labor market...

This paper argues that unemployment insurance increases labor productivity by encouraging workers to seek higher productivity jobs, and by encouraging firms to create those jobs. We use a quantitative general equilibrium model to investigate whether this effect is comparable in magnitude to the standard moral hazard effects of unemployment insurance. Our model economy captures the behavior of t...

This paper characterizes the labor supply and borrowing of a household facing collateral requirements that limit its debt and compel it to accumulate equity in its durable goods stock. The household’s discount rate exceeds the market rate of interest, so it would otherwise finance increased current consumption by borrowing against future wages. Collateral constraints generate a positive comovem...

नेपालको सुदुर पूर्वोत्तर भागमा पर्ने पाँचथर जिल्लाको उत्तरी अवस्थित याङवरक र हिलिहाङ गाउँपालिकाको सिमानामा हस्तपुर गढी रहेको छ । लिम्बूवानकालको पूर्वार्धमा स्थापना भएको यो ऐतिहासिक पुरातात्विक दृष्टिले महत्वपूर्ण अध्ययनको क्रममा यस गढीमा धेरै पुराना भौतिक अवशेषहरु पाइएका छन् हालसम्म पनि यस्तो महत्व बोकेको गढीको तथा विषयमा कुनै खोज अनुसन्धान हुन सकेको छैन उक्त पृष्ठभूमिमा कहिले कसले गर्यो ? के कस्ता वस्तुहरु रहेका गढीका स...

Specimens of Tubulanus riceae new species (Nemertea: Palaeonemertea) were collected from a Phragmatopoma worm reef in the surf zone at Fort Pierce (Florida, USA) and from sublittoral rubble at Carrie Bow Cay (Belize) and Bocas del Toro (Panama). They have well-developed lateral sensory organs, form a cellophane-like tube and appear to have ocelli-like structures. The latter, if confirmed as oce...

Whereas many nemerteans (ribbon worms; phylum Nemertea) can be identified from external characters if observed alive, many are still problematic. When it comes to preserved specimens (as in e.g. marine inventories), there is a particular need for specimen identifier alternatives. Here, we evaluate the utility of COI (cytochrome c oxidase subunit I) as a single-locus barcoding gene. We sequenced...